The mineral oil sandwerecompared with tong oil sand and residue of synthetie fatty acid-bonded sand.
对该种矿物油砂的铸造工艺性能与桐油砂和合脂砂作了比较。
2
Study is made for processing low grade tungsten mineral and waste residue of tungsten by soda sintering.
进行了苏打烧结法处理低品位钨矿和废钨渣的研究。
3
The main pollution sources are coal combustion, traffic emission, the residue of oil or mineral combustion and burning emission which accounts for 44.0%, 31.0% 19.9% and 4.7% of SVOCs, respectively.