代理销售 聚乙烯 1C7A 1I2A-1 1I50A LD100-AC LD605 LD607 LD608 LD163 LD165 LD400 LD450 1I7A 18D 18D0 2426H 2426F 线性 9020 7042 7042N 9455F 5000S 5200B 5300B 7600M 6100M 2911 聚丙烯 K8303 K7726 K7726H K4912 K1008 K1005 K1001 B4808 B4908 B4902 B8101 4220 4228      T30S 聚苯乙烯 666D 688B -500 635 525    18911072067