floatation n. 1.漂浮;(船的)下水。 2.【矿物】浮选(法)。 3.(公债等的)发行;(公司等的)设立;创业;(计划的)实行。 the floatation of a loan 筹资。 the centre of floatation 浮体的重心。 oil floatation 浮油选矿。
preferential adj. 1.优先的;优待的;优先选择的;差别制的。 2.(国际贸易等方面)特惠的。 n. 1.优先权。 2.特惠税率。 n. -ism 关税特惠主义。 n. -ist 关税特惠主义者。
Abstract : the advantages and disadvantages of the three pro cess flows and improvement measures were described based on the actual production condition of the three process flows including mixing floatation , preferential floatation in stages and partly mixing floatatoin in yongping copper mine 文摘:根据混合浮选、分步优先浮选、部分混合浮选三种浮选工艺流程在永平铜矿的生产实际情况,阐述其优缺点及改进措施。