Air distribution piping systems almost invariably use soft copper tubing with soldered fittings.

压缩空气的分配管道系统无例外地都是用焊接管件的铜管。

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Air distribution piping systems almost invariably use soft copper tubing with soldered fittings.

压缩空气的分配管道系统无例外地都是用焊接管件的铜管。

youdao