胶球泵清洗_真空除氧器_蒸汽消音器_风机|排汽|安全阀消声器_全自动电动滤水器_乏汽回收装置_射水抽气器_冷油器_加药装置_取样冷却器

产品知识

首页 > 新闻资讯 > 产品知识

为什么真空除氧器要给水除氧?

发布时间： 2015-01-31 浏览数：

必要性：真空除氧器给水中溶有气体的危害：腐蚀金属设备、降低其使用寿命；增大传热热阻，降低传热效果。

给水除氧的任务主要包括：除去水中的不凝结气体，防止设备腐蚀和传热恶化。

具体方法：热力除氧和化学除氧。

除氧器给水中溶解氧的主要来源：化学补充水带进；处于真空下工作的凝汽器、部分低压加热器等热力设备及管道附件不严密，漏进空气。

基本文件流程错误 SQL 调试

/home/lyjnjsil4yaj2n2jqs/wwwroot/public/index.php ( 0.82 KB )
/home/lyjnjsil4yaj2n2jqs/wwwroot/thinkphp/base.php ( 1.71 KB )
/home/lyjnjsil4yaj2n2jqs/wwwroot/thinkphp/library/think/Loader.php ( 12.70 KB )
/home/lyjnjsil4yaj2n2jqs/wwwroot/vendor/composer/autoload_static.php ( 1.53 KB )
/home/lyjnjsil4yaj2n2jqs/wwwroot/thinkphp/library/think/Error.php ( 4.00 KB )
/home/lyjnjsil4yaj2n2jqs/wwwroot/thinkphp/library/think/Container.php ( 17.20 KB )
/home/lyjnjsil4yaj2n2jqs/wwwroot/thinkphp/library/think/App.php ( 27.58 KB )
/home/lyjnjsil4yaj2n2jqs/wwwroot/thinkphp/library/think/Env.php ( 2.85 KB )
/home/lyjnjsil4yaj2n2jqs/wwwroot/thinkphp/library/think/Config.php ( 9.71 KB )
/home/lyjnjsil4yaj2n2jqs/wwwroot/thinkphp/convention.php ( 11.74 KB )
/home/lyjnjsil4yaj2n2jqs/wwwroot/application/tags.php ( 0.96 KB )
/home/lyjnjsil4yaj2n2jqs/wwwroot/thinkphp/library/think/Hook.php ( 5.58 KB )
/home/lyjnjsil4yaj2n2jqs/wwwroot/application/common.php ( 4.08 KB )
/home/lyjnjsil4yaj2n2jqs/wwwroot/thinkphp/helper.php ( 20.40 KB )
/home/lyjnjsil4yaj2n2jqs/wwwroot/application/provider.php ( 0.62 KB )
/home/lyjnjsil4yaj2n2jqs/wwwroot/config/app.php ( 5.47 KB )
/home/lyjnjsil4yaj2n2jqs/wwwroot/thinkphp/library/think/facade/Env.php ( 1.17 KB )
/home/lyjnjsil4yaj2n2jqs/wwwroot/thinkphp/library/think/Facade.php ( 3.44 KB )
/home/lyjnjsil4yaj2n2jqs/wwwroot/config/cache.php ( 0.95 KB )
/home/lyjnjsil4yaj2n2jqs/wwwroot/config/console.php ( 0.91 KB )
/home/lyjnjsil4yaj2n2jqs/wwwroot/config/cookie.php ( 1.11 KB )
/home/lyjnjsil4yaj2n2jqs/wwwroot/config/database.php ( 2.22 KB )
/home/lyjnjsil4yaj2n2jqs/wwwroot/config/log.php ( 1.16 KB )
/home/lyjnjsil4yaj2n2jqs/wwwroot/config/middleware.php ( 0.85 KB )
/home/lyjnjsil4yaj2n2jqs/wwwroot/config/session.php ( 1.06 KB )
/home/lyjnjsil4yaj2n2jqs/wwwroot/config/template.php ( 1.39 KB )
/home/lyjnjsil4yaj2n2jqs/wwwroot/config/trace.php ( 0.84 KB )
/home/lyjnjsil4yaj2n2jqs/wwwroot/vendor/topthink/think-captcha/src/helper.php ( 1.54 KB )
/home/lyjnjsil4yaj2n2jqs/wwwroot/thinkphp/library/think/facade/Route.php ( 3.84 KB )
/home/lyjnjsil4yaj2n2jqs/wwwroot/thinkphp/library/think/Route.php ( 25.84 KB )
/home/lyjnjsil4yaj2n2jqs/wwwroot/thinkphp/library/think/Request.php ( 57.54 KB )
/home/lyjnjsil4yaj2n2jqs/wwwroot/thinkphp/library/think/route/Domain.php ( 7.08 KB )
/home/lyjnjsil4yaj2n2jqs/wwwroot/thinkphp/library/think/route/RuleGroup.php ( 16.45 KB )
/home/lyjnjsil4yaj2n2jqs/wwwroot/thinkphp/library/think/route/Rule.php ( 28.92 KB )
/home/lyjnjsil4yaj2n2jqs/wwwroot/thinkphp/library/think/route/RuleItem.php ( 8.84 KB )
/home/lyjnjsil4yaj2n2jqs/wwwroot/thinkphp/library/think/route/RuleName.php ( 3.92 KB )
/home/lyjnjsil4yaj2n2jqs/wwwroot/thinkphp/library/think/facade/Validate.php ( 4.83 KB )
/home/lyjnjsil4yaj2n2jqs/wwwroot/thinkphp/library/think/Validate.php ( 43.93 KB )
/home/lyjnjsil4yaj2n2jqs/wwwroot/thinkphp/library/think/Db.php ( 7.67 KB )
/home/lyjnjsil4yaj2n2jqs/wwwroot/thinkphp/library/think/Lang.php ( 7.38 KB )
/home/lyjnjsil4yaj2n2jqs/wwwroot/thinkphp/library/think/Log.php ( 8.92 KB )
/home/lyjnjsil4yaj2n2jqs/wwwroot/thinkphp/library/think/log/driver/File.php ( 8.97 KB )
/home/lyjnjsil4yaj2n2jqs/wwwroot/thinkphp/lang/zh-cn.php ( 12.58 KB )
/home/lyjnjsil4yaj2n2jqs/wwwroot/route/route.php ( 1.56 KB )
/home/lyjnjsil4yaj2n2jqs/wwwroot/thinkphp/library/think/route/dispatch/Module.php ( 5.19 KB )
/home/lyjnjsil4yaj2n2jqs/wwwroot/thinkphp/library/think/route/Dispatch.php ( 9.26 KB )
/home/lyjnjsil4yaj2n2jqs/wwwroot/thinkphp/library/think/Middleware.php ( 5.34 KB )
/home/lyjnjsil4yaj2n2jqs/wwwroot/thinkphp/library/think/Cookie.php ( 7.35 KB )
/home/lyjnjsil4yaj2n2jqs/wwwroot/thinkphp/library/think/View.php ( 5.74 KB )
/home/lyjnjsil4yaj2n2jqs/wwwroot/thinkphp/library/think/view/driver/Think.php ( 6.12 KB )
/home/lyjnjsil4yaj2n2jqs/wwwroot/thinkphp/library/think/Template.php ( 47.31 KB )
/home/lyjnjsil4yaj2n2jqs/wwwroot/thinkphp/library/think/template/driver/File.php ( 2.29 KB )
/home/lyjnjsil4yaj2n2jqs/wwwroot/thinkphp/library/think/Session.php ( 14.13 KB )
/home/lyjnjsil4yaj2n2jqs/wwwroot/thinkphp/library/think/Debug.php ( 7.57 KB )
/home/lyjnjsil4yaj2n2jqs/wwwroot/thinkphp/library/think/Cache.php ( 3.27 KB )
/home/lyjnjsil4yaj2n2jqs/wwwroot/thinkphp/library/think/cache/driver/File.php ( 7.99 KB )
/home/lyjnjsil4yaj2n2jqs/wwwroot/thinkphp/library/think/cache/Driver.php ( 8.64 KB )
/home/lyjnjsil4yaj2n2jqs/wwwroot/application/index/controller/Detail.php ( 4.44 KB )
/home/lyjnjsil4yaj2n2jqs/wwwroot/thinkphp/library/think/Controller.php ( 7.53 KB )
/home/lyjnjsil4yaj2n2jqs/wwwroot/thinkphp/library/traits/controller/Jump.php ( 4.76 KB )
/home/lyjnjsil4yaj2n2jqs/wwwroot/thinkphp/library/think/facade/Cache.php ( 2.06 KB )
/home/lyjnjsil4yaj2n2jqs/wwwroot/application/index/model/NewsDetail.php ( 0.42 KB )
/home/lyjnjsil4yaj2n2jqs/wwwroot/thinkphp/library/think/Model.php ( 28.52 KB )
/home/lyjnjsil4yaj2n2jqs/wwwroot/thinkphp/library/think/model/concern/Attribute.php ( 17.64 KB )
/home/lyjnjsil4yaj2n2jqs/wwwroot/thinkphp/library/think/model/concern/RelationShip.php ( 20.60 KB )
/home/lyjnjsil4yaj2n2jqs/wwwroot/thinkphp/library/think/model/concern/ModelEvent.php ( 6.04 KB )
/home/lyjnjsil4yaj2n2jqs/wwwroot/thinkphp/library/think/model/concern/TimeStamp.php ( 2.58 KB )
/home/lyjnjsil4yaj2n2jqs/wwwroot/thinkphp/library/think/model/concern/Conversion.php ( 7.84 KB )
/home/lyjnjsil4yaj2n2jqs/wwwroot/thinkphp/library/think/model/concern/SoftDelete.php ( 5.68 KB )
/home/lyjnjsil4yaj2n2jqs/wwwroot/thinkphp/library/think/db/Connection.php ( 58.93 KB )
/home/lyjnjsil4yaj2n2jqs/wwwroot/thinkphp/library/think/db/connector/Mysql.php ( 6.22 KB )
/home/lyjnjsil4yaj2n2jqs/wwwroot/thinkphp/library/think/db/builder/Mysql.php ( 5.85 KB )
/home/lyjnjsil4yaj2n2jqs/wwwroot/thinkphp/library/think/db/Builder.php ( 36.76 KB )
/home/lyjnjsil4yaj2n2jqs/wwwroot/thinkphp/library/think/db/Query.php ( 105.00 KB )
/home/lyjnjsil4yaj2n2jqs/wwwroot/application/index/model/Categroy.php ( 0.21 KB )
/home/lyjnjsil4yaj2n2jqs/wwwroot/thinkphp/library/think/model/Collection.php ( 3.23 KB )
/home/lyjnjsil4yaj2n2jqs/wwwroot/thinkphp/library/think/Collection.php ( 13.60 KB )
/home/lyjnjsil4yaj2n2jqs/wwwroot/thinkphp/library/think/Response.php ( 9.68 KB )
/home/lyjnjsil4yaj2n2jqs/wwwroot/thinkphp/library/think/response/View.php ( 2.77 KB )
/home/lyjnjsil4yaj2n2jqs/wwwroot/runtime/temp/538d5824ff19a81ccf1f524c42925fd4.php ( 21.66 KB )
/home/lyjnjsil4yaj2n2jqs/wwwroot/thinkphp/library/think/debug/Html.php ( 4.02 KB )

[ DB ] CONNECT:[ UseTime:0.000726s ] mysql:host=127.0.0.1;dbname=lyjnjs;charset=utf8
[ SQL ] SHOW COLUMNS FROM `news_detail` [ RunTime:0.001426s ]
[ SQL ] SELECT * FROM `news_detail` WHERE ( `id` = 62 ) AND `news_detail`.`delete_time` IS NULL LIMIT 1 [ RunTime:0.000798s ]
[ SQL ] SHOW COLUMNS FROM `web_setting` [ RunTime:0.001433s ]
[ SQL ] SELECT * FROM `web_setting` WHERE `id` = 1 LIMIT 1 [ RunTime:0.000447s ]
[ SQL ] SHOW COLUMNS FROM `categroy` [ RunTime:0.001092s ]
[ SQL ] SELECT * FROM `categroy` WHERE ( `id` = 2 ) AND `categroy`.`delete_time` IS NULL LIMIT 1 [ RunTime:0.000508s ]
[ SQL ] SELECT * FROM `categroy` WHERE ( `reid` = 2 ) AND `categroy`.`delete_time` IS NULL [ RunTime:0.000608s ]
[ SQL ] SELECT * FROM `categroy` WHERE ( `id` = 3 ) AND `categroy`.`delete_time` IS NULL LIMIT 1 [ RunTime:0.000360s ]
[ SQL ] SELECT * FROM `categroy` WHERE ( `reid` = 3 ) AND `categroy`.`delete_time` IS NULL [ RunTime:0.000489s ]
[ SQL ] SELECT * FROM `categroy` WHERE ( `id` = 4 ) AND `categroy`.`delete_time` IS NULL LIMIT 1 [ RunTime:0.000590s ]
[ SQL ] SELECT * FROM `categroy` WHERE ( `id` = 84 ) AND `categroy`.`delete_time` IS NULL LIMIT 1 [ RunTime:0.000562s ]
[ SQL ] SELECT * FROM `categroy` WHERE ( `id` = 84 ) AND `categroy`.`delete_time` IS NULL [ RunTime:0.000492s ]
[ SQL ] SELECT `id`,`typeid`,`typename`,`sortrank`,`flag`,`click`,`title`,`litpic`,`pubdate`,`keywords`,`description`,`filename`,`redirecturl`,`update_time` FROM `news_detail` WHERE ( `arcrank` = 0 AND ( `typeid` = 84 OR `typeid2` = 84 ) ) AND `news_detail`.`delete_time` IS NULL ORDER BY `pubdate` DESC LIMIT 100 [ RunTime:0.001469s ]
[ SQL ] SELECT * FROM `categroy` WHERE ( `id` = 26 ) AND `categroy`.`delete_time` IS NULL LIMIT 1 [ RunTime:0.000407s ]
[ SQL ] SELECT * FROM `categroy` WHERE ( `id` = 26 ) AND `categroy`.`delete_time` IS NULL [ RunTime:0.000385s ]
[ SQL ] SELECT `id`,`typeid`,`typename`,`sortrank`,`flag`,`click`,`title`,`litpic`,`pubdate`,`keywords`,`description`,`filename`,`redirecturl`,`update_time` FROM `news_detail` WHERE ( `arcrank` = 0 AND ( `typeid` = 26 OR `typeid2` = 26 ) ) AND `news_detail`.`delete_time` IS NULL ORDER BY `pubdate` DESC LIMIT 100 [ RunTime:0.000704s ]
[ SQL ] SELECT * FROM `categroy` WHERE ( `id` = 92 ) AND `categroy`.`delete_time` IS NULL LIMIT 1 [ RunTime:0.000368s ]
[ SQL ] SELECT * FROM `categroy` WHERE ( `id` = 92 ) AND `categroy`.`delete_time` IS NULL [ RunTime:0.000350s ]
[ SQL ] SELECT `id`,`typeid`,`typename`,`sortrank`,`flag`,`click`,`title`,`litpic`,`pubdate`,`keywords`,`description`,`filename`,`redirecturl`,`update_time` FROM `news_detail` WHERE ( `arcrank` = 0 AND ( `typeid` = 92 OR `typeid2` = 92 ) ) AND `news_detail`.`delete_time` IS NULL ORDER BY `pubdate` DESC LIMIT 100 [ RunTime:0.000620s ]
[ SQL ] SELECT * FROM `categroy` WHERE ( `id` = 38 ) AND `categroy`.`delete_time` IS NULL LIMIT 1 [ RunTime:0.000349s ]
[ SQL ] SELECT * FROM `categroy` WHERE ( `id` = 38 ) AND `categroy`.`delete_time` IS NULL [ RunTime:0.000348s ]
[ SQL ] SELECT `id`,`typeid`,`typename`,`sortrank`,`flag`,`click`,`title`,`litpic`,`pubdate`,`keywords`,`description`,`filename`,`redirecturl`,`update_time` FROM `news_detail` WHERE ( `arcrank` = 0 AND ( `typeid` = 38 OR `typeid2` = 38 ) ) AND `news_detail`.`delete_time` IS NULL ORDER BY `pubdate` DESC LIMIT 100 [ RunTime:0.000689s ]
[ SQL ] SELECT * FROM `categroy` WHERE ( `id` = 33 ) AND `categroy`.`delete_time` IS NULL LIMIT 1 [ RunTime:0.000893s ]
[ SQL ] SELECT * FROM `categroy` WHERE ( `id` = 33 ) AND `categroy`.`delete_time` IS NULL [ RunTime:0.000654s ]
[ SQL ] SELECT `id`,`typeid`,`typename`,`sortrank`,`flag`,`click`,`title`,`litpic`,`pubdate`,`keywords`,`description`,`filename`,`redirecturl`,`update_time` FROM `news_detail` WHERE ( `arcrank` = 0 AND ( `typeid` = 33 OR `typeid2` = 33 ) ) AND `news_detail`.`delete_time` IS NULL ORDER BY `pubdate` DESC LIMIT 100 [ RunTime:0.000906s ]
[ SQL ] SELECT * FROM `categroy` WHERE ( `id` = 94 ) AND `categroy`.`delete_time` IS NULL LIMIT 1 [ RunTime:0.000553s ]
[ SQL ] SELECT * FROM `categroy` WHERE ( `id` = 94 ) AND `categroy`.`delete_time` IS NULL [ RunTime:0.000391s ]
[ SQL ] SELECT `id`,`typeid`,`typename`,`sortrank`,`flag`,`click`,`title`,`litpic`,`pubdate`,`keywords`,`description`,`filename`,`redirecturl`,`update_time` FROM `news_detail` WHERE ( `arcrank` = 0 AND ( `typeid` = 94 OR `typeid2` = 94 ) ) AND `news_detail`.`delete_time` IS NULL ORDER BY `pubdate` DESC LIMIT 100 [ RunTime:0.001076s ]
[ SQL ] SELECT * FROM `categroy` WHERE ( `id` = 47 ) AND `categroy`.`delete_time` IS NULL LIMIT 1 [ RunTime:0.000472s ]
[ SQL ] SELECT * FROM `categroy` WHERE ( `id` = 47 ) AND `categroy`.`delete_time` IS NULL [ RunTime:0.000344s ]
[ SQL ] SELECT `id`,`typeid`,`typename`,`sortrank`,`flag`,`click`,`title`,`litpic`,`pubdate`,`keywords`,`description`,`filename`,`redirecturl`,`update_time` FROM `news_detail` WHERE ( `arcrank` = 0 AND ( `typeid` = 47 OR `typeid2` = 47 ) ) AND `news_detail`.`delete_time` IS NULL ORDER BY `pubdate` DESC LIMIT 100 [ RunTime:0.000850s ]
[ SQL ] SELECT * FROM `categroy` WHERE ( `id` = 51 ) AND `categroy`.`delete_time` IS NULL LIMIT 1 [ RunTime:0.000426s ]
[ SQL ] SELECT * FROM `categroy` WHERE ( `id` = 51 ) AND `categroy`.`delete_time` IS NULL [ RunTime:0.000367s ]
[ SQL ] SELECT `id`,`typeid`,`typename`,`sortrank`,`flag`,`click`,`title`,`litpic`,`pubdate`,`keywords`,`description`,`filename`,`redirecturl`,`update_time` FROM `news_detail` WHERE ( `arcrank` = 0 AND ( `typeid` = 51 OR `typeid2` = 51 ) ) AND `news_detail`.`delete_time` IS NULL ORDER BY `pubdate` DESC LIMIT 100 [ RunTime:0.000791s ]
[ SQL ] SELECT * FROM `categroy` WHERE ( `id` = 57 ) AND `categroy`.`delete_time` IS NULL LIMIT 1 [ RunTime:0.000783s ]
[ SQL ] SELECT * FROM `categroy` WHERE ( `id` = 57 ) AND `categroy`.`delete_time` IS NULL [ RunTime:0.000499s ]
[ SQL ] SELECT `id`,`typeid`,`typename`,`sortrank`,`flag`,`click`,`title`,`litpic`,`pubdate`,`keywords`,`description`,`filename`,`redirecturl`,`update_time` FROM `news_detail` WHERE ( `arcrank` = 0 AND ( `typeid` = 57 OR `typeid2` = 57 ) ) AND `news_detail`.`delete_time` IS NULL ORDER BY `pubdate` DESC LIMIT 100 [ RunTime:0.000889s ]
[ SQL ] SELECT * FROM `categroy` WHERE ( `id` = 95 ) AND `categroy`.`delete_time` IS NULL LIMIT 1 [ RunTime:0.000575s ]
[ SQL ] SELECT * FROM `categroy` WHERE ( `id` = 95 ) AND `categroy`.`delete_time` IS NULL [ RunTime:0.000340s ]
[ SQL ] SELECT `id`,`typeid`,`typename`,`sortrank`,`flag`,`click`,`title`,`litpic`,`pubdate`,`keywords`,`description`,`filename`,`redirecturl`,`update_time` FROM `news_detail` WHERE ( `arcrank` = 0 AND ( `typeid` = 95 OR `typeid2` = 95 ) ) AND `news_detail`.`delete_time` IS NULL ORDER BY `pubdate` DESC LIMIT 100 [ RunTime:0.001029s ]
[ SQL ] SELECT * FROM `categroy` WHERE ( `id` = 63 ) AND `categroy`.`delete_time` IS NULL LIMIT 1 [ RunTime:0.000589s ]
[ SQL ] SELECT * FROM `categroy` WHERE ( `id` = 63 ) AND `categroy`.`delete_time` IS NULL [ RunTime:0.000425s ]
[ SQL ] SELECT `id`,`typeid`,`typename`,`sortrank`,`flag`,`click`,`title`,`litpic`,`pubdate`,`keywords`,`description`,`filename`,`redirecturl`,`update_time` FROM `news_detail` WHERE ( `arcrank` = 0 AND ( `typeid` = 63 OR `typeid2` = 63 ) ) AND `news_detail`.`delete_time` IS NULL ORDER BY `pubdate` DESC LIMIT 100 [ RunTime:0.000867s ]
[ SQL ] SELECT * FROM `categroy` WHERE ( `id` = 68 ) AND `categroy`.`delete_time` IS NULL LIMIT 1 [ RunTime:0.000493s ]
[ SQL ] SELECT * FROM `categroy` WHERE ( `id` = 68 ) AND `categroy`.`delete_time` IS NULL [ RunTime:0.000614s ]
[ SQL ] SELECT `id`,`typeid`,`typename`,`sortrank`,`flag`,`click`,`title`,`litpic`,`pubdate`,`keywords`,`description`,`filename`,`redirecturl`,`update_time` FROM `news_detail` WHERE ( `arcrank` = 0 AND ( `typeid` = 68 OR `typeid2` = 68 ) ) AND `news_detail`.`delete_time` IS NULL ORDER BY `pubdate` DESC LIMIT 100 [ RunTime:0.001092s ]
[ SQL ] SELECT * FROM `categroy` WHERE ( `id` = 93 ) AND `categroy`.`delete_time` IS NULL LIMIT 1 [ RunTime:0.000529s ]
[ SQL ] SELECT * FROM `categroy` WHERE ( `id` = 93 ) AND `categroy`.`delete_time` IS NULL [ RunTime:0.000522s ]
[ SQL ] SELECT `id`,`typeid`,`typename`,`sortrank`,`flag`,`click`,`title`,`litpic`,`pubdate`,`keywords`,`description`,`filename`,`redirecturl`,`update_time` FROM `news_detail` WHERE ( `arcrank` = 0 AND ( `typeid` = 93 OR `typeid2` = 93 ) ) AND `news_detail`.`delete_time` IS NULL ORDER BY `pubdate` DESC LIMIT 100 [ RunTime:0.001076s ]
[ SQL ] SELECT * FROM `categroy` WHERE ( `id` = 5 ) AND `categroy`.`delete_time` IS NULL LIMIT 1 [ RunTime:0.000451s ]
[ SQL ] SELECT * FROM `categroy` WHERE ( `reid` = 5 ) AND `categroy`.`delete_time` IS NULL [ RunTime:0.000584s ]
[ SQL ] SELECT * FROM `categroy` WHERE ( `id` = 6 ) AND `categroy`.`delete_time` IS NULL LIMIT 1 [ RunTime:0.000336s ]
[ SQL ] SELECT * FROM `categroy` WHERE ( `reid` = 6 ) AND `categroy`.`delete_time` IS NULL [ RunTime:0.000526s ]
[ SQL ] SELECT * FROM `categroy` WHERE ( `id` = 100 ) AND `categroy`.`delete_time` IS NULL LIMIT 1 [ RunTime:0.000336s ]
[ SQL ] SELECT * FROM `categroy` WHERE ( `reid` = 7 ) AND `categroy`.`delete_time` IS NULL [ RunTime:0.000542s ]
[ SQL ] SELECT * FROM `categroy` WHERE ( `id` = 8 ) AND `categroy`.`delete_time` IS NULL LIMIT 1 [ RunTime:0.000407s ]

0.142532s