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专利名称：Visualization device发明人：Gerald J. Litt申请号：US06/808461申请日：19851213公开号：US04824230A公开日：190425
摘要：Apparatus for indicating the presence of a liquid on a member includes asubstrate having a pattern thereon that is perceptibly visually modified by the presenceof a liquid on the member.
申请人：E. I. DU PONT DE NEMOURS AND COMPANY
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