Junctions of metal for pipes
... 金属管道接头 Junctions of metal for pipes 金属管道接头 Junctions of metal for pipes 金属管道配件 Pipework of metal ...
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金属管道接头 metal pipe fittings
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短语
非金属管道接头
non-metallic pipe joints
管道金属接头
junction of metal for pipes