G6KU-2G-Y-3V G6KU-2G-Y-3V 通信继电器 G6KU-2G-Y-3VDC G6KU-2G-Y-4.5V G6KU-2G-Y-4.5VDC G6KU2GY5DC G6KU-2G-Y-5V G6KU-2G-Y-5VDC G6KU-2GY-5VDC G6KU-2G-Y-DC3