Ventilator cover with waterproof and breathable functions and switch machine
Contact constant-temperature heating device for electric switch machine
Connection transmission device of switch machine and switch machine
MOTOR GEARBOX CAPABLE OF IMPLEMENTING TWO-WAY HAND-CRANKING OPERATION 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
Hand crank automatic power-off device for electric switch machine