Block Caving
天车
阶段自然崩落法
分块崩开采法
崩塌式采矿法
自然崩落
High-level-interval block caving system
square-set block caving
block and block [= chocka-block
forced oscillation [= forced vibration]
Forced-oil and forced-air cooling system
2 atrioventricular block and complete atrioventricular block
BDCB Block Device Control Block
Block 36 and Block 38 in Oman
block by block relaxation operator
block by block transfer
block gage (gage block) (slip gage)
Block Xia 502 and Block Xia 509