cottered joint

例句：

1. 1. The old car had a cottered joint in the rear wheel.
   这辆旧车后轮有一个扣合关节。
2. 2.The scientist used a cottered joint to connect two pieces of metal together.
   科学家用一个扣合接头将两块金属连接在一起。
3. 3. The engineer tested the cottered joint for strength and durability.
   工程师测试了扣合接头的强度和耐用性。