1) middle and small sewage treatment plant
中小型污水处理厂
1.
One of the major problems in the construction and operation of middle and small sewage treatment plant is the treatment and disposal of sludge.
要寻找一种适合于中小型污水处理厂使用的操作简单、成本低廉的污泥脱水调理剂,以替代目前常用的PAM调理剂,达到降低污泥处理成本,减少二次污染的目的。
2) medium-and-small-sized
中小
3) small towns
中小城镇
1.
Major environment impacts of water supply projects in small towns;
中小城镇供水项目的主要环境影响
4) middle and small coal mine
中小煤矿
1.
According to the present stitutation of middle and small coal mines in our country,all kinds of existing problems are analyzed.
根据我国中小煤矿现状,针对存在的各种问题进行分析,提出了改革采煤方法、推广无煤柱开采、加强地质工作、衰老矿井资源挖潜等节约煤炭资源的有效途径。
5) moderate and small stations
中小站段
1.
With the growth of railroad traffic mileage rapidly,the moderate and small stations increase.
铁路通车里程迅速增加,铁路中小站段随之增长。
6) medium and small towns
中小城镇
1.
A novel activated sludge-biofilm integrative reactor(ASBIR) was developed to treat the wastewater from medium and small towns.
针对中小城镇污水处理的特点开发了活性污泥-生物膜复合一体化反应器,该反应器实现了反应区和沉淀区一体化,综合了活性污泥法和生物膜法的优点,具有运行稳定、占地面积少、基建投资低、管理方便的优点,并具有较好的去除有机物和脱氮除磷能力。
2.
This paper analyzes on the main probl ems existing in the water -supply system in medium and small towns,and expounds the measures and key lin ks of the technical transformation o f the water -supply system.
分析了中小城镇给水系统存在的主要问题,阐述了给水系统技术改造的措施及其关键环节。
参考词条
补充资料：小型张
四周带有装饰边的单枚小张邮票。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。