Recent foul smelling air in part of the city, caused by a gas leak at a nearby oil refinery, according to the Shanghai Daily, has compounded the pollution woes.
A compounded system mainly composed of petroleum sulfonate was developed and then an oil displacement efficiency experiment was carried out.
通过大量的室内实验，研制出以石油磺酸盐为主剂的复配体系，并开展了驱油效率实验。
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A volatile pressing oil HC-L200 was formulated with hydrotreated narrow fraction light base oil, fatty acid ester lubricant and additives, such as homemade wetting agent and compounded antirust agent.
根据铝翅片冲压加工工艺的技术特点，选用加氢精制窄馏分轻质油为基础油，添加特制的脂肪酸酯为油性剂以及自制的润湿剂和复合防锈剂等添加剂调合成HC - L 200挥发性冲压油。