Return air duct section. Single- or double-line ducts can be specified.
回风管道部分。可以指定单线管道或双线管道。
Supply or return duct section. Single- or double-line ducts can be specified.
送风或回风管道部分。可以指定单线管道或双线管道。
Duct extension. Supply or return duct can be specified. Single- or double-line ducts can be specified.
管道延伸。可指定送风管道或回风管道。可以指定单线管道或双线管道。
Additional supply duct section. Supply or return duct can be specified. Single- or double-line ducts can be specified.
附加送风管道部分。可指定送风管道或回风管道。可以指定单线管道或双线管道。
Multi fan section. From 2 to 4 fan sections can be specified. Single- or double-line ducts can be specified.
多个扇形段。可指定2到4个扇形段。可以指定单线管道或双线管道。
Drag onto the page, then right-click to specify single- or double-line ducts.
拖到绘图页上，然后右击可以指定单线管道或双线管道。
Drag onto the page, then right-click to specify number of fan sections or single or double-line ducts.
拖到绘图页上，然后右击可以指定风机段、单线管道或双线管道的数量。
Research on Double-layered Pressure Pipes and Their On-line Safety Monitoring Technology;
双层压力管道及其在线安全监控技术研究
Study on Some Techniques of Doubly Linked Crude Oil Transport Pipeline Leak Detection;
双线原油管道泄漏检测系统若干技术的研究
a tube or pipe for enclosing electrical cables or wires.
电线、电缆的管道.
bistable storage cathode ray tube
双稳态存储阴极射线管
The WHC is a dual three-lane, immersed-tube road tunnel linking the West Kowloon Expressway with the Western District.
西区海底隧道是一条双程三线沉管行车隧道，连接西九龙快速公路与港岛西区。
A tube or duct for enclosing electric wires or cable.
线管包裹电线或电缆的管子或沟道
Distributing conduit collective drawings for telecommunication
通信电缆配线管道图集
twin pipelines [aviation fuel receiving facility]
双管道输油管〔飞机燃料接收设施〕
Double Layer SAW Pipe with Large Diameter for Transmitting Oil and Gas
油气输送管道用大直径双层埋弧焊管
Motorway;Dual Carriageway;Primary Route;Secondary Route;Narrow Road/Street
高速公路;双车道;主要路线;辅助路线;狭窄道路/街道
external two-channel radiotelemetrical detector
外双通道无线电遥测检测器