| 摘要 |
PROBLEM TO BE SOLVED: To safely and efficiently perform an operation by properly controlling the running of a vehicle or the lifting of a working platform. SOLUTION: With the opened and closed state of a guard and the lift of the working platform taken into account, the running of the vehicle or the lifting of the working platform is controlled. Namely, even when the guard is open, if the lift of the working platform is lower than a specified height, the running of the vehicle or the lifting of the working platform is allowed since a risk due to falling is not given to an operator.
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