The synthetic technique of new type high molecular ashless dispersant of polybutene (PBP) and dimaleic anhydride was described.
介绍了新型高丁烯双来酸酐散剂的合成工艺。
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I don't think there's any higher type in the world than a first-rate Englishman, do you?
我界上没有一流英国级的了, 是吗?
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