1.【矿】横梁,横撑;支柱
1.a supporting timber in a mine or mineshaft
1.and stull my heart is saying we were right.
我心底的声音告诉我我们是对的
2.The Study and apply of the coal pillar width Parameter in along stull tunnel
沿空巷道煤柱宽度参数的研究与应用