What are the advantages of slip blow compared with other slips

The manual drill pipe slips, drill stem slips and casing slips have high labor intensity and low work efficiency, and the semi-automatic drill pipe slip is used to hold the drill pipe, because it uses the cylindrical spring and the external force and self weight of the operator to realize the lifting of the slip body, the degree of automation is low, and the safety is poor, but the slip blow can realize the automatic lifting of slip body, save labor cost and improve production capacity.