直接邮寄广告业在特卖品的包装方面已经变得非常熟练了。The direct marketing industry has become adept at packaging special offers.这会让你的促销品显得个性十足、格调高雅。This will give your promotional material individuality and style.因为稀有并且品相完好，它价值连城。It was a real pri...
介绍阻火器的分类、选型及安装.Introduces the categories of arresters and their type selection and installation.水泵选型时, 其水流量比主机水流量大15%至20%左右.Pump selection, the current host of water flow than 15 - 20 % or so.机电系统控制硬件的选型设计是一件非常繁复的工作.To s...
Don't be surprised to find your biggest interrupter is your boss!如果你最大的被打扰的来源是你的老板的话你千万不要感到奇怪!The vacuum degreevacuum interrupter will have the direct effect upon the properties of vacuum switch.真空灭弧室内真空度将直接影响真空开关的性...