steel sheave pulley block

例句：

1. 1.The engineer used a steel sheave to adjust the tension in the cable.
   工程师使用一个钢套筒来调整电缆的张力。
2. 2.The steel sheave was crucial for the machine's smooth operation.
   这个钢套筒对于机器的平稳运行至关重要。
3. 3. The steel sheave was replaced after it broke during testing.
   在测试中，这个钢套筒断裂后被更换了。