twin pipe line 双管线
PLASTIC TWIN PIPE EXTRUSION 塑料双管押出机
twin-pipe PCEA 自控镇痛
twin-pipe collector 调节．校准
twin head pipe bender 双头弯管机
twin-pipe pneumatic conveying 双管气力输送
twin-pipe pneumatic conveying system 双管气力输送系统
twin exhaust pipe 双排气管
The line produces single-wall corrugated pipe made for PVC or PE material. It is made up twin(single)-screw extrude, forming machine, reeling machine and so on.
该生产线用于生产PVC、PE原料的单壁波纹管，主要由双（单）螺杆挤出机、成型机、收卷机等主设备组成。
According to the complication of pipe-jacking crossing the Yellow River some techniques such as twin-pipe joined without hinging, relay ring, slurry damper are applied.
针对济南市引黄供水穿黄顶管的复杂工况，详细介绍了以二段无铰式工具管为头部的顶管施工工艺及中继环、泥浆减阻等先进技术的使用。
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