coal(rock) pillar leaving  煤(岩)柱留设

fault waterproof coal rock pillar  断层防水煤岩柱

leaving coal pillar  煤柱留设

abandoned coal pillar  走向煤柱

audio emission of coal rock  煤岩声发射

belt coal pillar  条带煤柱

boundary coal-pillar  边角煤; 支持向量机(support vector machine,SVM)

characteristic signal of coal rock  煤岩特征信号

COAL PILLAR  谋柱; 煤柱

Coal pillar design  急倾斜煤层

Coal pillar for protection of buildings  保护煤柱

coal pillar for protection of builings  保护煤柱

coal pillar for sand proof  防砂煤柱

coal pillar for water preserving  保水煤柱; 通道

Coal Pillar Recovery  回收煤柱

coal pillar scale  煤柱尺寸

Coal pillar size  煤柱尺寸

COAL PILLAR STABILITY  煤柱稳定性

coal pillar under railway line  铁路煤柱

Coal Pillar Width  煤柱宽度