价格：面议
poly iso butylene-pib2400

价格：面议
pad resin

价格：面议
c5 aliphatic hydrocarbon resin-dy-100

价格：面议
c5 hydrogenated hydrocarbon resin-h100、h115

价格：面议
polyisobutylene pib1200

价格：面议
pib35000-65000