石油钻井安全知识 (1).pptVIP

Requirements For Operation Showing landing spot: Five fingers open and point to the spot where the load is to be landed. Extending Boom: Both fists hold up and face upward with thumbs pointing to both sides and moving in outwards direction. Requirements For Operation Retracing Boom: Both fists hold up and face downwards with thumbs pointing toward each other, and moving in inward direction. Horizontally moving hook: One forearm holds up vertically at one side with five fingers closing up and facing outwards, wave downwards to the position level to the shoulder towards the moving direction of the load. Requirements For Operation Horizontally and slightly moving hook: One forearm holds up vertically with five fingers closing up and facing outwards, repeatedly makes horizontal movement slowly towards the moving direction of the load. Rotating Boom: One arm extends horizontally and points to the direction for rotating the boom, thumb outstretched and the rest fingers closed to rotate around the wrist. Requirements For Operation Slightly Rotating Boom : One forearm extends forward with the palm facing inward, the thumb of another hand points to the above-mentioned palm and rotates with the rest fingers closed. Raising Boom : One arm extends to the side horizontally with the thumb pointing upwards and the rest fingers closed, the forearm waves upwards. Requirements For Operation Lowering Boom : One arm extends to the side horizontally with the thumb pointing downwards and the rest fingers closed, the forearm waves downwards. Slightly Raising Boom : One arm at one side of chest with five fingers open and palm downward motionlessly, another hand has its thumb pointing to the above-mentioned palm and rest fingers closed to move up and down. Requirements For Operation Slightly Lowering Boom : One arm put at one side of chest with five fingers open and palm upward motionlessly, another hand has its thumb pointing to the above-mentioned palm and rest fingers c