... ,such as a crown block,traveling block,hook,swivel, rotary table,mast & substructure are in compliance with API standards, ... electricity, hydraulics and pneumatics into design, the intelligent control for drilling rig is realized through PLC technology and touch screen. 2. ... 2)698.5 (27 1/2)Shift number of rotary tableMechanical driven2 forward 2 reverseCombination driven1 stepless variableDC2 forward ...