城市下压煤
coal block under urban area
村庄下压煤
coal under villages
Coal Mining under Village
建筑物下压煤
Coal Mining under buildings
液压压下控制系统
hydraulic screwdown control system
液压压下系统
hydraulic screw down system
Hydraulic screw-down system
hydraulic capsule control system
hydraulic AGC
hydraulic loading system
hydraulic gauge control system
液压压下油缸
hydraulic screwdown cylinder
液压压下自动辊缝控制
hydraulic automatic gauge control
三下煤柱
coal-pillar under three circumstances
常温下压装配合
Press fit under general temperature
常压下渗透脱水
osmotic dehydration at atmosphere pressure