single sheave iron pulley block

例句：

1. 1. The engineer used a single sheave iron pulley block to adjust the tension of the rope.
   工程师使用一个单槽铁滑轮块来调整绳索的张力。
2. 2. The construction worker was using a single sheave iron pulley block to lift the heavy materials.
   建筑工人正在使用一个单槽铁滑轮块来搬运沉重的材料。
3. 3. The farmer used a single sheave iron pulley block to move the heavy load from one place to another.
   农民使用一个单槽铁滑轮块将重物从一个地点移动到另一个地点。