供应Ultradur PBT B6550LN高粘挤出级PBT ¥22.00 供应Ultradur PBT B6550高粘挤出级PBT ¥22.00 供应Ultradur PBT LUX B4300G4玻璃纤维增强可激光焊接PBT ¥28.00 供应Ultradur PBT LUX B4300G6玻璃纤维增强可激光焊接PBT ¥28.00 供应Ultradur PBT LUX B4520玻璃纤维增强可激光焊接PBT ¥28.00 供应Ultradur PBT+ASA S4090G2玻璃纤维增强低翘曲PBT ¥28.00