Super High Seam 特厚煤层
inclined high seam mining method [矿业] 倾斜厚煤层采煤法
high seam mining method [矿业] 厚煤层采煤法
high seam mining 开采厚煤层
high-seam mining 开采厚煤层
middle and high seam 中厚煤层
high-seam working face 大采高综采工作面
high seam caving mining 大采高放顶煤开采
high and extra-high seam 厚及特厚煤层
The high seam drill 2000 is stainless steel construction and the cylinder rods of the 1st inner legs of the stinger and drill leg are stainless steel.
这种厚煤层钻孔机2000是不锈钢结构，钻头第一内部腿架的活塞杆和钻孔机支架都是不锈钢的。
Cavern development is the main controlling factor of high productivity and large reserves amount, while fracture development improves connectivity of seam cavern system.
溶洞发育是较高产能和较大储量规模的主控因素，而裂缝发育扩大了缝洞系统的连通性。
A new process of high speed seam welding with secondary rectification for double seam possesses good weld quality, high welding speed, smooth bead and low consumption features.
双缝高速次级整流缝焊是一项新工艺，具有焊接质量好、焊接速度快、焊缝表面光洁及能耗低等优点。
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