B. JAN/03/2020 due to part of the cause of the blow is not clear, arrange Qiu staff on the actual simulation of the day's maintenance action and standing related position, simulation process found that the person will be right hand above the door frame, just pressed on the start BACKUP SLIDE HANDLE HANDLE, while observing the comparison of the worker's height, standing position and beat mode and OVER DOOR PULL off the action (Figure 1), found that the actual simulation condition is in line with BACKUP SLIDE strike conditions.
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