国产麻豆天美果冻无码视频_中文字幕97在线_在线观看国产黄片_91久久香蕉国产熟女线看_无码在线中文字幕_91精品日韩在线观看_国产av福利久久精品无码动漫

技術(shù)支持 / Technical

熱銷產(chǎn)品 / Hot Products

0755-85258900
0755-85258903
0755-84656505
0755-84656716

專業(yè)知識

氣體檢測儀ppm濃度是什么意思-深國安官網(wǎng)

有些小伙伴對氣體檢測儀ppm濃度單位都不知道怎么去換算的情況，首先PPM的全稱為part per million，PPM值是一種常用表示氣體濃度的單位，它表示百萬分之一的氣體體積濃度。關(guān)于氣體檢測儀ppm濃度單位轉(zhuǎn)換ppb，1ppb=1/1000ppm;1ppb=1/1000ppm;ppb表示十億分之一，ppm表示百萬分之一,因此1ppm=1000ppb。

相關(guān)資訊：有毒氣體檢測儀器顯示pass什么意思

固定式氣體檢測儀

在線客服

工業(yè)安全
大氣環(huán)保
醫(yī)療衛(wèi)生
新能源
石油化工
高?？蒲?img border="0" src="/Uploads/img/kf01.gif" alt="點(diǎn)擊這里給我發(fā)消息" title="點(diǎn)擊這里給我發(fā)消息">
傳感器
技術(shù)支持

熱線電話

0755-85258900

返回頂部

基本文件流程錯誤 SQL 調(diào)試

/www/wwwroot/singoan_com/index.php ( 0.71 KB )
/www/wwwroot/singoan_com/ThinkPHP/ThinkPHP.php ( 4.42 KB )
/www/wwwroot/singoan_com/ThinkPHP/Library/Think/Think.class.php ( 11.53 KB )
/www/wwwroot/singoan_com/ThinkPHP/Library/Think/Storage.class.php ( 1.60 KB )
/www/wwwroot/singoan_com/ThinkPHP/Library/Think/Storage/Driver/File.class.php ( 3.54 KB )
/www/wwwroot/singoan_com/Runtime/common~runtime.php ( 79.60 KB )
/www/wwwroot/singoan_com/Application/Common/Behavior/InitHookBehavior.class.php ( 1.65 KB )
/www/wwwroot/singoan_com/ThinkPHP/Library/Think/Behavior.class.php ( 0.88 KB )
/www/wwwroot/singoan_com/ThinkPHP/Library/Think/Cache.class.php ( 3.85 KB )
/www/wwwroot/singoan_com/ThinkPHP/Library/Think/Cache/Driver/File.class.php ( 5.88 KB )
/www/wwwroot/singoan_com/Application/Home/Conf/config.php ( 5.58 KB )
/www/wwwroot/singoan_com/Application/Home/Conf/routers.php ( 76.06 KB )
/www/wwwroot/singoan_com/Application/Home/Common/function.php ( 3.65 KB )
/www/wwwroot/singoan_com/ThinkPHP/Library/Behavior/ReadHtmlCacheBehavior.class.php ( 5.60 KB )
/www/wwwroot/singoan_com/Application/Home/Controller/ArticleController.class.php ( 4.25 KB )
/www/wwwroot/singoan_com/Application/Home/Controller/HomeController.class.php ( 1.61 KB )
/www/wwwroot/singoan_com/Application/Common/Api/ConfigApi.class.php ( 1.86 KB )
/www/wwwroot/singoan_com/ThinkPHP/Library/Think/Model.class.php ( 58.52 KB )
/www/wwwroot/singoan_com/ThinkPHP/Library/Think/Db.class.php ( 32.45 KB )
/www/wwwroot/singoan_com/ThinkPHP/Library/Think/Db/Driver/Mysql.class.php ( 10.78 KB )
/www/wwwroot/singoan_com/Application/Home/Model/DocumentModel.class.php ( 10.13 KB )
/www/wwwroot/singoan_com/Application/Home/Logic/PageoneLogic.class.php ( 1.68 KB )
/www/wwwroot/singoan_com/Application/Home/Logic/BaseLogic.class.php ( 1.86 KB )
/www/wwwroot/singoan_com/Application/Home/Model/CategoryModel.class.php ( 4.74 KB )
/www/wwwroot/singoan_com/Runtime/Cache/Home/2c7e25892c1d87122991fb8165f51b0f.php ( 31.72 KB )
/www/wwwroot/singoan_com/ThinkPHP/Library/Behavior/WriteHtmlCacheBehavior.class.php ( 0.98 KB )
/www/wwwroot/singoan_com/ThinkPHP/Library/Behavior/ShowPageTraceBehavior.class.php ( 5.24 KB )

0.2162s