用水平尺上侧同标记对齐保持水平。
Use level ruler to keep level with the marks.
youdao
比传统水平尺实用得多，具有一定的推广意义。
Much more practical than the traditional level, have certain popularization meanings.
用水平尺量一下。
Check it with a level.
应用推荐
模块上移
模块下移
不移动