DDF8B computer board 17FE850B1, F8B 17FE810 DF8B microcomputer microcomputer board, board 17FE820, DF8B 17FE830A1 DF8B microcomputer microcomputer board, 17FE840A1 board, SS4 locomotive axle temperature junction box, locomotive long copper head shaft temperature sensor, valve QTYC-L15Z, WKQ shutter temperature controller (single single control group, high temperature) WKQ shutter temperature controller (dual control of low temperature and high temperature) TAG：