The new type sanitary cigarette packing method can avoid the contamination of the filter tip in cigarette caused by pollutant in hand and other pollutant source.
一种可以避免手部污染物、污染源由于吸烟而经香烟过滤嘴的传递进入人口腔的卷烟新型卫生包装。
2
When biological filter tank is used to treat sanitary wastewater, COD in effluent can satisfy Class I of the discharge standard for urban wastewater treatment plant.
实验针对间歇投配污水的生物渗滤池处理生活废水的一些基本运行参数进行了优化研究。
3
This invention relates to structural changing of the waste water drain trap in housing construction and the double valve water tank of the waste water filter and sanitary ware urinal.