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Document Designation and Title Year Select Item(s) D1389 Standard Test Method for Proof-Voltage Testing of Thin Solid Electrical Insulating Materials 06 D1389 Standard Test Method for Proof-Voltage Testing of Thin Solid Electrical Insulating Materials 97a(2004) D1389 Standard Test Method for Proof-Voltage Testing of Thin Solid Electrical Insulating Materials 97a