Communicate with the front-end concrete rubber hose operator when starting or stopping pumping concrete. The bending radius of the front-end concrete pump hose should be greater than 1m. The operator is not allowed to stand at the outlet of the concrete rubber hose to prevent the concrete from being suddenly sprayed and hurting people.
Always check whether the safety chain of the concrete rubber hose and the concrete pump boom are firmly connected. Prevent the concrete rubber hose from being bent and blocked when the concrete pump truck is operating.
