seal-welded taper pipe threaded joint
螺纹连接，管螺纹连接 threaded joint, pipe threaded joint 锥管螺纹密封焊连接 seal-welded taper pipe threaded joint 球墨铸铁管规格表承插焊连接（接头） socket welded joint ..
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... 螺纹连接；管螺纹连接 Threaded joint; pipe 锥管螺纹密封焊连接 Seal-welded taper pipe 承插焊连接（接头） Socket welded joint ...
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