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底部掏槽
eng.geol. undercutting
expl. floor cut; holing; under-cutting; underhole; break-in; downcut; lower cut
met. undercut
mining. underholing
tech. bottom cut; bottom draw cut; jad; toe cut; draw cut
底部掏〔截〕槽
gen. underhollow
底部 掏 槽
: 8 phrases in 2 subjects
Explosives and Explosive Ordnance Disposal7
General1