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Tiêu chuẩn bạn cần đây (kích vào số tiêu chuẩn để mở link tải về) IS IEC 309-2-1989 Plugs, socket-outlets and couplers for industrial purposed - Part 2 - Dimensional interchangeablility requirements for pin and contact tube accessoriesEm cũng đang cần gấp tiêu chuẩn IS IEC 309-2-1989 Plugs, socket-outlets and couplers for industrial purposed - Part 2 - Dimensional interchangeablility requirements for pin and contact tube accessories. Bác nào có cho em xin với. Em xin cám ơn trước!