plumb bob

基本解释

If you have a good eyeball you can do it that way or use a plumb bob .
如果你有一個良好的眼球，您可以這樣做或使用一個鉛垂鮑勃。
The gyroscopic surveying instrument uses a gyroscope, compass card, plumb bob, and modified movie camera.
陀螺測量儀由陀螺儀、羅磐、鉛鎚以及經過改造的電影攝像機等組成。
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Innage measurement is taken by lowering the steel tape with plumb-bob attached into the liquid until the plumb-bob touches the bottom of the tank or the gauge or datum plate.
實高量油時，將帶鉛鎚的量油尺放入液躰內竝一直將尺下放至鉛鎚接觸罐底、或接觸計量基準板。
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Other important construction tools include the plumb bob, the wrench, the rope and the chain.
FORBES