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传统的方法是,用一种能较好地吸附于指纹细节上的黑色粉末敷在表面上,但利用这种传统方法却不能“显示出”诸如塑料之类无孔表面上的隐伏指纹。
Traditionally, black powder applied to fingerprints has been applied to the surface with a traditional method that does not “reveal” hidden fingerprints on non-porous surfaces such as plastic.