大家在查：克劳斯贝 RemembertheMilk traffic light potentially could 卢拉钦陆景 Hydrolyzing 冬菜 evangel chylous

煤井

n.colliery

煤井

煤井

1

Rescuers are drilling three shafts to the part of the mine where the men are holed up and then plan to hoist them up.

营救人员正在矿工们栖身的煤井部分钻探三个逃生井，计划将这些矿工从这里升井。

2

Pre-evaluation of occupational hazards of a rebuilding project in a coal mine

某煤矿改扩建煤井项目职业病危害预评价

3

Design and Implementation of Monitoring System for the Medium and Small Coal Mine

中小型煤井监控系统的设计与实现

4

Development and application of air sealing device of coal silo and underground coal bin

储煤仓及漏煤井防漏风装置的研制及应用效果

5

granary , Meijing explosion-proof security basket ;

粮仓、煤井安检防爆吊篮；

热词推荐

大家在看

man , . you 's " after ? : - Facebook what Yeah then your japan 4th as of own