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单词 stoper
释义

stoper

noun

stop·​er
ˈstōpə(r)
plural -s
1
: a drillman who works in a stope
2
: a hammer drill mounted on a pneumatic feed cylinder and used for drilling vertical and inclined holes in stopes

called also stope drill

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更新时间:2024/12/23 18:24:44