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... OR REPEATED EXPOSURE: Repeated or prolonged contact with skin may cause dermatitis. Animal tests show that this substance...

...的觀察: Since water drops had proved inadequate for prolonged observation of this ion catching phenomenon, Millikan used oil...

...one, the reaction of methanolysis approved to equilibrium after 2 h, prolonging the reaction time did not efficiently increase conversion of FFA. 在第三個...