The said coating uses supersonic pretreatment of basilar plate and is prepared by the technical measure of artificial chemical gas-phase sedimentation.
该膜采用基板超声预处理，在优化工艺条件下人工化学气相沉积等技术措施制备。
2
Abstract: the reasons of the decrease of flocculating sedimentation of activated sludge in the process of bio chemical sewage treatment were analyzed.
文摘：分析了在污水生化处理过程中活性污泥沉降性能下降的原因。
3
The reasons of the decrease of flocculating sedimentation of activated sludge in the process of bio chemical sewage treatment were analyzed.