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contour (perimeter) hole
释义
contour (perimeter) hole
Encyclopedia
工学
掘进爆破
释
contour (perimeter) hole
周边眼
沿断面轮廓钻凿的炮眼。能够控制爆破后的掘进断面形状、大小和轮廓,使之符合爆破设计要求。
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theodolite traverse
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TheodoreⅡ
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更新时间:2026/6/9 16:12:53