middlings造句

• Study on separating middlings in self - production medium cyclone
  自生介质旋流器洗选中煤的尝试
• One of those mixed middlings he is
  他就是个两性掺在一起的中性人。
• Study on separate treatment of the middlings of electrical separation
  电选中矿单独处理的研究
• Study and prevention for middlings group water hazard in haizhi coal mine
  海孜煤矿中煤组水害的研究与防治