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crater cut
expl.
漏斗掏槽
掏槽的一种形式。它和中空直孔掏槽一样垂直开挖面钻凿一组平行的炮孔,不同之处是所有的炮孔都装药,而且较一般的掏槽方式炮孔多、装药集中,形成漏斗掏槽
crater cuts
tech.
漏斗形掏槽
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