Assigned personnel wearing orange reflective vests guide cranes and trucks, cranes hanging the work area to circle around a triangular pyramid links and ban non-related personnel to enter
Designate personnel wearing orange reflective vests to guide cranes and trucks, crane crane hanging work area surrounded by triangular cone linkage ring and prohibit non-related personnel from entering
Assign personnel wearing orange reflective vest to guide the crane and freight car. The crane hanging operation area is surrounded by triangular cone connecting rod and non relevant personnel are prohibited to enter<br>