caving-working-face

英['keɪvɪŋw'ɜːkɪŋf'eɪs] 美['keɪvɪŋw'ɜːkɪŋf'eɪs]
  • 炮采放顶煤
  • Cauchy [计]柯西
  • integral adj.完整的;构成整体所必需的n.[数]积分;完整
  • theorem n.定理