Free faces should be rough, parallel and reasonably near to blastholes and, very importantly, concavely biplanar relative to the charges ( see Fig. 6b).

  • 同时非常重要的是,自由面相对于药包应是人字形双面自由面(见图6b)。

  • 互联网摘选 2025-01-20 17:53:44

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