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【毎日のテーマ】【エンジニアリング版20160508】

2016-05-08View Original

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参加報酬:2財富。正解の報酬:9財富 次のうち、露天鉱山での爆発作業の安全性を高めるための措置ではないものはどれか()。  A. 複数列孔の微差爆破を採用  B. 複数列孔の微差押し出し爆破を採用  C. 缓衝爆破を採用  D. 開放式深孔爆破
Reply #22016-05-09
以下のうち、露天鉱山の爆破において爆破の安全性を高めるための措置でないものはどれか(D)。  A. 複数列孔の微差爆破を採用  B. 複数列孔の微差押し出し爆破を採用  C. 缓衝爆破を採用  D. 開放式深孔爆破

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