The structure, the principle of work, bauxite floatation of BF - L floatation machine were presented.本文介绍了BF -L 型浮选机的结构特点, 工作原理及铝土矿选矿的适应性研究.B factor ( BF ) in thyroid function hyperfunction sickness blood serum content a...
我们大多数航班行李限重为每位乘客44磅。Most of our flights have a baggage allowance of 44lbs per passenger.他力主对安全部队设限。He urged restraint on the security forces.这些文件仍仅限公务员使用.Access to the documents remains restricted to civil servants....