With portability and simple operation , it need not filtration medium , non pollution and low price ; precision three - stage filtration system with high filtration precision ; it can filter mechanical impurities of various types of oils and meet requirements of long - range high - lift oil adding and pumping 不用滤纸不污染场地价格低廉精密的三级过滤系统，过滤精度gl - 300型高即能精细滤除各类油中的机械杂质，又能满足远距离高扬程的加油抽油使用。
This paper introduces the main issues of information filtering including the system structure of information filtering , the characteristic and classification of filtration system , the relation between retrieving and filtering , the common model of filtering system , the evaluation index of the system performance and so on . it dwells on the if questions as a whole and points out the existent problems in current if systems 文本将介绍web上的信息过滤的基本问题，包括：信息过滤的体系结构，过滤系统的特点及分类，检索和过滤的关系，过滤系统常用的模型以及过滤系统的性能评价指标等，从总体上对过滤问题进行一定的讲述，指出现存的信息过滤系统中存在的问题。
The guangzhou nine red fine chemical industry limited companies , are located the scenery beautifully , the transportation convenience guangzhou god mountain industrial district , the factory area ten chinese acres , 10 , 000 square meter production workshops , introduction overseas first - class cosmetics production line ， has the enclosed air conditioning workshop , large - scale vacuum mulser , fills automatically installs the production line equipment , the advanced examination system , the purification processing system , the disinfection filtration system , and is equipped with complete micro examines the room and the biochemistry checkout room 广州市九红精细化工有限公司，位于风景秀丽、交通便利的广州神山工业区，工厂占地面积十余亩， 1万余平方米的生产车间，引进国外一流的化妆品生产线，具备封闭式空调车间，大型真空乳化机，自动灌装生产线设备，先进的检测系统，净化处理系统，消毒过滤系统，并设有完备的微检室和生化检验室。
The mechanism of scale and plugging in the filtration system of phosphoric acid is introduced , the status about scale and plugging in the filtration system of pa plant in yunfeng company is analyzed and some measures , such as adopting high grade phosphate rock , controlling the technological indexes in extractor better , strengthening the management of operation and technology in filtration system and making a good job of maintaining and managing equipment , are put forward for decreasing scale and plugging , improving the performance rate of plant 分析磷酸过滤系统结垢堵塞的原因，介绍云峰公司磷酸装置过滤系统结垢堵塞状况，提出减少结垢、堵塞，提高开车卑的具体措施：采用高品位的磷矿，严格控制革取槽的工艺指标，加强过滤系统技术管理，搞好设备维护工作。
Practice during the period of four years shows : ( 1 ) settled water pond and three - stage filtration system with mechanical agitation can meet the requitments of reverse - osmosis components to the inlet water quality ; ( 2 ) it must be considered in the design that the demineralization efficiency of reverse - osmosis components will be decreased about 1 % 2 % in every year ; ( 3 ) in normal case , the outlet water from reverse - osmosis equipment shall enter into mixed bed via a decarbonator ; ( 4 ) the output capacity of the mixed bed must have a sufficient surplus , to avoid its influence on the water supply 经4年的实践表明： ( 1 )采用机械搅拌澄清池和三级过滤的系统，可以达到反渗透组件对进水水质的要求； ( 2 )反渗透组件的脱盐率每年约降低1 % 2 % ，在设计中必须考虑； ( 3 )一般情况下，反渗透装置的出水应经过除碳器再送入混床； ( 4 )混床的出力必须有足够的余量，以免影响供水。
