Deadweight testers are the basic primary standard for accurate measurement of pressure.
自重测试仪是基本的测量压力设备。
First of all, the paper expatiate the basic methods of work measurement and standard time measurement methods based on the stopwatch.
论文首先阐述了作业测定基本方法与基于秒表法的标准工时测定方法。
First of all, the paper expatiate the basic methods of work measurement and standard time measurement methods based on the stopwatch.
论文首先阐述了作业测定基本方法与基于秒表法的标准工时测定方法。
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