超音波法液位元元元元元元测定
ultra-sonic method of liquid meaduremert
苯酐聚酯多元醇
benzoic anhydride polyester polyols
蓖麻油酸聚酯多元醇
ricinoleate-based polyester polyol
芳烃聚酯多元醇
aromatic polyester polyol
芳烃聚酯多醇
aromatic polyester polyol
聚碳酸亚丙酯多元醇
poly propylene carbonate polyols
poly(propylene carbonate)polyols
聚碳酸亚乙酯多元醇
poly(ethylene ether carbonate) polyols