sighting-level

常见例句

• Construction workers are measuring distances with a level.
  施工人員正在用水準儀進行測距工作。
• It is easy to use a water level to measure things, but you need to do many experiments before mastering it.
  水準儀的測量方法很簡單，但也需要通過多次的實踐才能夠掌握。
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