... level line || 水平线，等高线 level line and surface || 水平线及水平面 level loader || 水平式装载机 ...
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level line and surface
水准线及水准面
以上为机器翻译结果，长、整句建议使用 人工翻译 。
More modern versions of the tool add in a laser beam projector, which allows builders to level out the device and "draw" a long line of light across a wall, indicating an exactly level surface.
FORBES: No. 18 The Level
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模块上移
模块下移
不移动