underhand longwall中文意思是什麼

underhand longwall解釋
下向梯段式長壁回採

  • underhand: adj adv 1 【板球、網球】低位手的[地]〈手的位置在肩或肘的水平線下〉;低手扔[打]的[地];(射箭)瞄...
  • longwall: 長壁法回採

※英文詞彙underhand longwall在字典百科英英字典中的解釋。

  1. Analysis on strata pressure of fully mechanized longwall coal mining face in soft roof, soft coal and soft floor seam

    三軟煤層綜采長壁工作面采場礦壓分析
  2. She " s an underhand little thing : i never saw a girl of her age with so much cover

    這小東西真狡猾,從來沒見過像她這樣年紀的小姑娘,有那麼多鬼心眼的。 」
  3. Formation and application of the front abutment pressure on longwall face

    論采場前方支承壓力的形成及應用
  4. Mining horizontal pillars with hydraulic roof propping in longwall caving method

    在長壁式崩落法中用液壓支柱護頂回採水平礦柱
  5. Longwall shearing and heading machines ; shanks of cutting tools and their assembly openings

    長壁剪切機和鐓鍛機.切刀柄和其安裝開口
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