Although pentasodium phosphate ( STPP) was a detergent builder with good washing ability it was also one reason of which induce eutrophication in close or semi-close water area. So, to search a substitution of STPP is becoming ever important.
三聚磷酸钠是性能优良的合成洗涤剂助剂,但它是封闭或半封闭水体富营养化的原因之一,寻找其替代品已成为一个热点课题。
The epidemiology and controlling methods of Schistosomiasis japonica of mountainy livestock were studied in two types of mountainous epidemic districts in Sichuan province, which were s-CED ( Semi-Close Epidemic District) and CED ( Close Epidemic District), respectively.
对四川山区家畜血吸虫病两类不同疫区:以芦山为代表的半封闭式疫区和以普格为代表的封闭式疫区进行了流行病学及防制对策研究。
The semi-closing sanitary dustpan of the utility model has the advantages of simple structure, good using effect, etc.
本实用新型的半封闭式卫生簸箕具有结构简单、使用效果佳等特点。
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