Removal of migration barriers is again inequality improving but less so.
取消人口流动限制仍能改善不平等，虽然不能全面改善。
PID is a technique used for improving nitrogen and phosphorous removal in wastewater treatment.
PID技术是废水处理中提高氮、磷去除的技术。
Measures for improving the quality of filter paper are discussed in terms of beating degree, fines removal, mercerization treatment, sepiolite acid treatment, additives addition, drying and pressing.
本文从控制打浆度、筛除细小纤维、丝光化处理、酸处理海泡石、加入助剂、干燥和压榨等方面讨论了提高海泡石配抄植物纤维生产滤纸质量的措施。
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