准尺

例句：

1. 1. He used a ruler to measure the length of the wall.
   他用直尺测量了墙的长度。
2. 2. The carpenter used a tape measure to measure the width of the door.
   木匠用卷尺测量门的宽度。
3. 3. The engineer used a caliper to measure the thickness of the metal sheet.
   工程师用卡尺测量金属板材的厚度。