The production of pipe fittings of professional manufacturers.
生产管件的专业厂家。
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。
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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