Two types of end are standard on steel pipes and fittings, that is flanged and screwed.
钢管和管件有两种标准端部型式,即:法兰和丝扣。
Two types of end are standard on steel pipes and fittings, that is flanged and screwed.
钢管和管件有两种标准端部型式,即:法兰和丝扣。 。
Two types of end are standard on steel pipes and fittings that is flanged and screwed.
钢管和管件有两种标准端部型式,即:法兰和丝扣。
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