It shows from in situ experiment and theoretical analysis that the bolt connecting chain is an effective, economical and practical supporting unit.

经现场试验和理论分析表明，锚杆联系链的支护效果很好，是一种经济、实用的新型支护材料。

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It shows from in situ experiment and theoretical analysis that the bolt connecting chain is an effective, economical and practical supporting unit.

经现场试验和理论分析表明，锚杆联系链的支护效果很好，是一种经济、实用的新型支护材料。

youdao