薄与极薄矿脉开采
Exploitation of thin and extra-thin vein
缓倾斜薄矿脉
deep mine
Gently inclined thin vein
缓倾斜极薄矿脉
gently inclined and very thin ore vein
gently inclined and thin ore vein
急倾斜薄矿脉
Steeply dipping thin vein
Steep narrow vein
thin mineral ore inclines urgently
超薄薄膜吹塑机
blow-moulding machine for extrathin film
复杂多层薄矿体
Complex multi-seam thin ore bodys
缓倾斜薄矿体
Flat and thinner orebody
slight slope and thin ore body
缓倾斜极薄矿床
Gently inclined and extremely thin iron mine