刀柱回采遗留煤体
knife column recovery coal mining
长壁留煤柱
long wall with coal pillar
长壁留煤柱支撑法
longwall remaining coal pillars support
长壁留煤柱支撑法开采
longwall remaining coal pillars support mining
防砂煤柱留设
Set Safety Pillar prevent Sand
小煤柱留巷
retain roadway with small pillar
被其他特指人员的忽视照料和遗弃
By other specified persons
被熟人或朋友的忽视照料和遗弃
By acquaintance or friend
补遗和勘误
A&C addenda and corrigenda