What requirements should hoistway safety doors, access doors and access trapdoors meet? ①Do not open into the shaft; ② A lock with a key should be installed, and when the door is opened, wholesale access panels it can be closed and […]
What requirements should hoistway safety doors, access doors and access trapdoors meet? ①Do not open into the shaft; ② A lock with a key should be installed, and when the door is opened, wholesale access panels it can be closed and […]