Taking GD-101 macroporous resin as a concentratingagent, counter-stream, in-series concentrated method to concentrate the organic substances in water.
以大孔径树脂为富集剂，逆流串联富集法，一次性富集水中有机物；
2
The invention relates to a press master, in particular to a double-roller press master that is used for the washing and the dehydrated concentrating of a sizing agent.
本发明涉及的是一种挤浆机，尤其涉及一种用于浆料的洗涤和脱水浓缩的双辊挤浆机。
3
Some research circumstances of agent for selective concentrating and leaching molybdenum ores have been reviewed in the former Soviet union.