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放矿口
gen. millhole
archit. hurry
met. discharge lip; discharge mouth; discharge opening
tech. drawhole; mill hole
放矿口在岩体中人工形成的、将爆落矿石装车的放矿通道。它可以是竖井的底部结构，或是通向崩落区的一条平巷
expl. draw point
放 矿 口: 4 phrases in 2 subjects
Metallurgy2
Technology2

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