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English Translations » 历史存档[信息] » 【Daily Topic】【Engineering Version 20160506】

【Daily Topic】【Engineering Version 20160506】

2016-05-06View Original

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Participation reward: 2 Wealth. Reward for correct answer: 9 Wealth. In shaft and tunnel engineering, bolted support is mainly used in ( ). 　　A. Tunnels in unstable rock strata, or in soft and fractured rock strata B. Stable rock strata C. Stable tunnels D. Mining area tunnels
Reply #22016-05-06
A. Tunnels in unstable rock formations, or soft and fractured rock formations
Reply #32016-05-06
D、、、、、、、、、、
Reply #42016-05-06
A. Tunnels in unstable rock formations, or soft and fractured rock formations

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Translated at 2026-07-21 00:18:55

Original: https://bbs.hcbbs.com/thread-1584108-1-1.html

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