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k13

k13k13
  1. Long time stability of K13 alloy

    K13合金的长期稳定性

  2. The thin plate theory analysis of K13 thin seam hard roof and pressure forecast at the bai-la-pin Colliery

    白腊坪煤矿K(13)薄煤层坚硬顶板的薄板理论分析及其来压预报