conveyor belt gravity take up with warning danger tape sing tag around structure

abseiling belt coal construction container controlling conveyor danger development device dirt earth energy engineering equipment excavation extraction factory fall field geology giant gold goldmine gravity harness heavy huge industrial industry inspector its large load loosing machine machinery material mechanism metal metals mine minerals modern movement phosphate pile position power precious quarry raw resource roller rubber safety sand sing soil stock stocks structure tag take tape technology tie tool transfer transport transportation warning wearing working yard