井下

例句与用法

Many coal - miners were imprisoned in a pit accident
在一次塌方事故中，许多矿工被压在了井下。
Transform of ventilation system of multistage fan stations in wells
井下多级机站通风系统改造
Probe into the survey method of the underworkings ' section view
井下巷道剖面图测量方法的探讨
6 freed from mine in inner mongolia , 29 still nderground
内蒙古矿井六人获救，二十九人仍在井下
Analysis of load capacity of underground trackless tyred vehicle
浅析井下无轨胶轮车的承载能力
Plastic pipes in coal mining part 1 : polyethylene pipes
煤矿井下用塑料管材.第1部分:聚乙烯管材
Design of underground monorail haulage system at xianshang mine
象山煤矿井下单轨吊运输系统设计
Research of adiabatic material used in mine
井下热害防治材料研究
Extensible belt conveyors for coal mine
煤矿井下用伸缩带式输送机
Centrifugal type local fans for underground
井下用离心式局部风机