In a variety of pipe fittings, ass fittings cost performance is second to none.
在各种管件中，铜管件的性能价格比是首屈一指的。
The production of pipe fittings of professional manufacturers.
生产管件的专业厂家。
Valves are technically pipe fittings, but are usually discussed as a separate category.
排气阀在技术上管件，但通常是作为一个单独的讨论范畴。
Valves are technically pipe fittings, but are usually discussed as a separate category.
排气阀在技术上管件，但通常是作为一个单独的讨论范畴。
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