单词pipe layer
un.: 管道敷设机；埋管机
埋管机
管道敷设机
The cross-section structure in radial direction contains central plastic pipe layer, outer and inner reinforced protecting layers.
其径向断面结构包括中部塑料管层、外层增强保护膜层和内层增强保护膜层。
A plastic-steel coated pipe is composed if internal plastic pipe, adhesive layer, steel pipe layer, thermosol layer and plastic layer.
一种塑钢包覆管材及制造方法，由内塑料管层、粘接层、钢管层、热熔胶层和塑料包覆层所组成。
Development of an Seeping-pipe Layer Used in Greenhouse
温室用渗灌管铺管机的研制及试验研究
Resolution of Control Problem of Pipe Layer Auto-return
管层自动回库控制问题的解决