- during the operation in terrain or in the place of unloading/loading, the work follows the safety rules of operator of the arm/ vehicle
- during the unloading/loading, the operator gives out safety instructions which are necessary for easy course of work. Not obeying or refusing of these safety instructions may result in interrupting the work until these problems are solved.
- The operator may- must call help to unloading/ loading if the situation necessitates it
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