无规共聚聚丙烯 meaning in Chinese

ppr

Pp - r random polypropylene aluminum stable composite pipe
无规共聚聚丙烯
Performance analysis of several pp - r pipes
无规共聚聚丙烯管材性能分析
Discussions on the application of pp - r pipe in water supply systems for buildings
无规共聚聚丙烯管材在建筑给水中的应用探讨
Pp - r propylene random copolymer materials for piping systems for hot and cold water installations
冷热水管道系统用无规共聚聚丙烯
The reason is that the polypropylene is a kind of chain chemical compound that its raw materials have no rule altogether
原因是其原料无规共聚聚丙烯是一种链化合物。