The paper summarises the operational performance of the interlock System in pit-head equipment at No. 8 shaft of Ping-Ding-Shan Mine Bureau, Henan Province.
本文总结了作者根据河南省平顶山矿务局八矿井口实际情况所设计的一套井口设施联动闭锁系统。
2
Sergei, who now walks with a cane, says serving in Chechnya was like “sticking my head in a refuse pit”.
谢尔盖如今依靠拐杖走路，他说在车臣做事就像“把脑袋拴在裤腰带上”。
3
Coolly architectural ... a detail of Hilla Becher's series of Pennsylvania pithead photographs (1974)