DEFC直接乙醇燃料电池defabbr.防御（=defense）abbr.延缓的（=deferred）abbr.定义（=definition）abbr.明确的（=definite）defibuillator便携式除颤仪defloculation反絮凝defluoidation除氟率defoamer agent消沫剂defocused lens散焦透镜def-ferences差异Defibrillators除颤器defecation pan澄清釜defueling pump抽油泵defatting pill减肥丸