塑料建材K7760H、K7780、K7100
PP管材原料EP548RQ
燕山三元共聚聚丙烯F5606
管材级塑料原料K8003
塑料建材K7760H、K77..
塑料建材TJZS-2650
塑料建材聚乙烯7042N