黑龙江呼玛段炸药破冰试验研究
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Experimental study of anti-ice blasting with explosive in Huma section of the Heilongjiang River
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图7. 爆破坑类型 |
Fig.7. Type of blasting pits: complete crushing pit (a), mountain-shaped crushing pit (b), standard crushing pit (c) and post-blasting ice cracks (d) |
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