check valve seat造句

例句与造句

1. The check valve seats shall be of molded thermoplastic construction
   止回阀阀座应该是模制热塑塑料结构。
2. Check valve seats are replaceable without the use of special tools
   止回阀阀座可更换，不需要采用特殊工具。
3. Boilor check valve seat
   止回阀座
4. Check valve seat
   止回阀座
5. It's difficult to find check valve seat in a sentence. 用check valve seat造句挺难的