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1, The plan contained no provisions for the long-term clean-up that would have been necessary if the tanker had been carrying heavier crude.

2, A new surfactant heavy crude oil sulfonates ( HCOS ) was synthesized from Daqing Heidimiao oil with fuming acid.

3, The gushing oil is light, not the heavy crude of the Exxon Valdez spill.

4, Heavy crude oil of Tahe is a inferior and heavy oil. It is processed with the shallow splitting unit and cannot get qualified with light oil, but can get qualified with heavy fuel oil.

5, The task and the problems of heavy crude processing in China have been analyzed.

6, The emulsifying viscosity - reducing experiments of Wangzhuang heavy crude oil are performed.

7, Thermal recovery boiler, the key equipment of heavy crude extraction, is a direct current horizontal boiler.

8, In - situ combustion is one of effective methods for heavy crude oil at home and abroad.

9, Dilational viscoelasticity of oil-water interface film formed by vacuum residue fractions from Iranian heavy crude oil was studied by using L-B method.

10, The improved mobility ratio and the adjusted cut plane by the emulsion enhanced the heavy crude recovery efficiency.

11, In this paper, the characteristic, laboratory evaluation ,(http://sentencedict.com/heavy crude.html) commercial test and field application effect of the demetallization agent for delayed coking of super heavy crude oil were mainly discussed.

12, Pinon adds that Venezuela is unlikely to carry out threats of further cuts of exports to the U.S. because it relies on American customers and refineries to process its heavy crude.