... including Digital control VF rig,Mechanical cold weather rig, Electromechanical Rig ,DC rig,mechanical rig ,trailer drilling rig. techonlogy from USA china ... we can talk with you face to face! Rig ModelZJ20DBSZJ30DBSZJ40DBSZJ50DBSZJ70DBSNominal drilling depth, 127mm(5)DP, m ... to oneDrilling Rigdrilling rig,land drilling rig,Drill rig,oil drilling rig,low-temperature rig,best rig in china ,drilling ...