They are employed by coal, metal and non-metallic mineral mines and quarries.
他们受雇于煤炭，金属和非金属矿物矿场和采石场。
At present, the domestic and international research about the mineral biotechnology concentrates on the metallic ores mainly, and there is much less research in the fields of non-metallic ores.
目前，国内外有关矿物微生物技术的研究主要集中于金属矿，非金属矿方面的研究较少。
Kaolin is an important non - metallic mineral resources and it can be used in papermaking, rubber, plastics and so on.
高岭土是一种重要的非金属矿产资源，可广泛用于造纸、橡胶、塑料等方面。
Only has proven reserves of mineral resources in, there are 13 kinds of metallic minerals and 29 kinds of non-metallic minerals.
仅目前已探明储量的矿藏中，就有13种金属矿和29种非金属矿。
Zhen West has long been often rather non-metallic mineral producing areas.
西岭镇长期以来是常宁非金属矿的重要产区。
Widely in the electronic materials, magnetic materials, bio-medicine, ceramic glaze, non-metallic mineral, new materials and other industries use.
可广泛在电子材料、磁性材料、生物医药、陶瓷釉浆、非金属矿、新型材料等行业使用。
Blue asbestos is a fibrous variety (morph) derived from alkali hornblende and is a kind of special non-metallic mineral resources seldom seen.
蓝石棉是碱性角闪石的纤维变种，是一种较为稀见的特种非金属矿产。
The machine used for glaze, slurry material and other large volume of slurry mixing, and makes slurry no sediment in ceramic, non-metallic mineral industries.
本机用于陶瓷、非金属矿等行业釉料、泥料等大容积浆料的搅拌，使浆料不产生沉淀。
The machine used for glaze, slurry material and other large volume of slurry mixing, and makes slurry no sediment in ceramic, non-metallic mineral industries.
本机用于陶瓷、非金属矿等行业釉料、泥料等大容积浆料的搅拌，使浆料不产生沉淀。
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