hold a test tube 握住试管
A computer tube can hold a lot more gasoline than a lightbulb.
电脑显示器的电子管可比小小的灯泡能装多了。
A cathode ray tube can hold 300 volts of passive electrical storage, so use a hefty screwdriver across the main power supply capacitor, first.
任何阴极射线管都储存有三百伏电压,所以先要用一把强力螺丝起子来对付主电容器。
Hold tube bend in position, Fig. 5, and mark tube on level with top of hex on compression coupling. Cut off tube at this mark.
将管子弯头握住在位置上,图5,在压紧联轴节上六角顶部标注管道水平位置。
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