The synthetic technique of new type high molecular ashless dispersant of polybutene (PBP) and dimaleic anhydride was described.
介绍了新型高异丁烯双来酸酐无剂的合成工艺。
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Luckily, you can take a deep breath of ashless oxygen, knowing that something like this will probably never happen, at least not in our lifetime.
,此时你可以深呼吸没有火山氧气,并且意识到这样事情不会发生,起码在有生之年不可能。
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