Mutual control reversing action circuit of double-direct-current railway signal switch machine
MOTOR GEARBOX CAPABLE OF IMPLEMENTING TWO-WAY HAND-CRANKING OPERATION FOR ELECTRIC SWITCH MACHINE
Steering wheel position adjusting mechanism and commercial vehicle
Contact constant-temperature heating device for electric switch machine
Motor gear box capable of realizing bidirectional hand-cranking operation of electric switch machine
SMART MANAGEMENT DEVICE FOR HAND-CRANK TOOL OF SWITCH MACHINE
Intelligent management device for hand-cranking tool of switch machine