Technology on Precasting Culvert Pipe by the Method of Suspended Rolling and Its Control at Site.
悬辊法预制涵管的工艺及其现场控制
The hand piece of the suspended type submerged arc welding machine and an accessory enter the cylinder body through pipe orifices.
悬挂式埋弧焊接机头和附件通过管孔进入筒体。
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