Based on the idea,a new extensible bolt is designed for large deformation support of surrounding rock.

 
  • 室內與現場(chǎng)試驗證實(shí)了新型可伸長(cháng)錨桿協(xié)調圍巖大變形的優(yōu)良性能,可在圍巖大變形支護中推廣應用。
今日熱詞
目錄 附錄 查詞歷史
国内精品美女A∨在线播放xuan