... their technicality,usability, applicability, reliability. Recondition and renovate the old rigs, improve their technicality ... the parameter, improve the Synthesis Technique and the capability of rigs.¨ Optimize rigs’ transmission, ... of rig semi-mechanical control¨ The reform of rig environmental adaptation: desert、gobi、plateau、jungle、frigid zone、ice cover and marsh Reconditioning and Renovation of ...