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辅助炮眼 fǔzhù pàoyǎn
gen. raker
el. easers
eng.geol. pop hole
oil easer; helper; slab hole
tech. helper hole; lifter hole; relief blasting method; relief hole; reliever; satellite hole; seat row hole; shot easer
辅助炮眼
: 1 phrase in 1 subject
Technology1