英语词汇“deep-hole with large diameter”的翻译、意思、用法、释义-英汉汉英双解词典

词汇	deep-hole with large diameter
释义	deep-hole with large diameter 基本例句大直径深孔 In crater retreat blasting at underground mines,each largediameter hole will be used time and again.地下矿山大直径深孔分层装药爆破时，每个炮孔要分段多次利用。
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