Various MSs of cullers sitting by conveyors, picking up ore chunks containing asbestos fibres longer than a certain length (usually fibres over three quarters of an inch long). Interior shots large pipes and machinery in room, of operator strolling about, supervising. Shots from various angles and distances, of cage winch, of operator, of large dial indicating position of cage at any instant. CU of face of operator. Various shots of miners coming out of mine, entering.