metallic packing ring

例句：

1. 1.This new type of packing ring is more durable and efficient than the old one.
   这种新型的填料环比旧的更耐用、更有效。
2. 2.The engineer used a metal packing ring to seal the valve.
   工程师使用金属填料环来密封阀门。
3. 3. The metal packing ring was crucial in preventing leaks during the assembly process.
   金属填料环在组装过程中防止泄漏至关重要。