carpenters water level rule

例句：

1. 1. The carpenter used the ruler to measure the length of the board.
   木匠使用这个尺子来测量木板的长度。
2. 2. The carpenters followed the rule to ensure that the wood was dry before they started building.
   木匠们遵循这个规则，以确保木头干燥后再开始建造。
3. 3. The carpenters used this rule to check the moisture content of the wood before they cut it.
   木匠们使用这个规则来检查木头的湿度含量，然后再进行切割。