sighting-level

常见例句

• Construction workers are measuring distances with a level.
  施工人员正在用水准仪进行测距工作。
• It is easy to use a water level to measure things, but you need to do many experiments before mastering it.
  水准仪的测量方法很简单，但也需要通过多次的实践才能够掌握。
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