hard rock mining的意思|示意
美 / hɑrd rɔk ˈmaɪnɪŋ /
英 / hɑː(r)d rɑk ˈmaɪnɪŋ /
硬岩开采
hard rock mining相关例句
In North America, heavy - mining and hard - rock mining are the occupations most frequently associated with chronic silicosis.
的粉尘引起的.在北美地区, 重金属矿和石矿是慢性硅肺的主因.
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