The compositions of grease were eluted with petroleum ether, benzene, chloroform, ethyl acetate, acetone, ethanol and characterized by means of IR and NMR spectroscopy.
油脂部分依次以石油醚、苯、氯仿、乙酸乙酯、丙酮、乙醇为淋洗剂进行洗脱，利用红外光谱、核磁共振光谱法对所分离组分进行了结构鉴定。
Ineffective processing and disposal of oils, grease, petroleum hydrocarbons, surfactants or solvents used in vehicle washing and degreasing degrade surface water (AAPA, 1998).
油污类、油脂、石油的碳氢化合物、表面活性剂或是洗涤船只的溶剂和油污表面去脂水等不当处理和弃置而形成污染。(aapa, 1998年)。
The principle and experiments on the measurement of grease stain in petroleum pipeline using the thermal neutron gauge were reported.
叙述了利用热中子透射计测石油管道内油垢厚度的原理、实验和结论。
The principle and experiments on the measurement of grease stain in petroleum pipeline using the thermal neutron gauge were reported.
叙述了利用热中子透射计测石油管道内油垢厚度的原理、实验和结论。
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