2 Petroleum crude oil: Refers to naturally occurring crude oil that is mixtures of hydrocarbon compounds that contain ma二石油原油：指一种源于自然界之原油，为碳氢化合物之混合物，其主要成分为石蜡烃、环烷烃、芳香烃等。
Parafin was emulsion is used to humidify when the fiberglass is produced.拉制玻璃纤维原纱时采用石蜡乳剂作浸润剂，其含量不大于2.2%。