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выемка целиков stresses
geol.	abstraction of pillars; pillar drawing; pillar operation; pillar working
goldmin.	robbing (MichaelBurov)
mining.	pillar extraction; second working; pillaring; stoping; dropping of pillars; pillar pulling; pillar recovering; pillar robbing; robbing work; stripping; stumping
tech.	pillar mining; second mining; posting; pillar stoping
выемка целика
geol.	stump extraction; stump pulling
mining.	pillar drawing; pillar recovery; stump recovery; pillar extraction; abstraction of pillar; pillar extracting; pillar recovering; pillar withdrawing; stump drawing
tech.	pillar removal; pillar mining

выемка целиков: 52 phrases in 4 subjects

Geology	2
Gold mining	2
Mining	46
Technology	2