mason's float

例句：

1. 1.The mason used a float to measure the length of the wall.
   这位木匠用一个浮标来测量墙壁的长度。
2. 2.The engineer used a float to check the accuracy of the measurements.
   工程师使用一个浮标来检查测量的准确性。
3. 3. The builders used floats to mark the corners of the walls.
   建筑工人使用浮标来标记墙壁的角落。