Shijiazhuang is a representative city for the study of groundwater saltpollution.
石家庄市地下水盐污染研究具有典型示范性。
2
There exist some unassailable problems in traditional chrome tanning, such as low exhaustion of chrome, saltpollution from pickling, and time-consuming process, etc.
传统浸酸铬鞣存在着一些不容忽视的问题，如：铬的吸收率低，浸酸时带来的盐污染，鞣制周期长等。
3
The aim is to solve the lower percent of dye utilization and the serious environment pollution problem caused by high salt dosages and residual dyes in dyeing solution.