Joke Collection Website - Bulletin headlines - What are the safety protection devices for construction elevators?
What are the safety protection devices for construction elevators?
1, fall safety device
2. Price limit
3. Limit limit
4. Buffer spring
5. Upper and lower threshold switches
6. Single-wire threshold switch
7. Top Threshold Position Switch
8. Fence lock
9. one-way door lock
10, uplink and downlink door locks
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