The petroleum drilling rigs are classified into 5 grades by the nominal drilling rig range limit and the maximum hook load:Model: ZJ30/1700, ZJ40/2250, ZJ50/3150, ZJ70/4500, ZJ90/5850By the drive type: Electric Drive Drilling Rigs, Electromechanical Drilling Rigs, and Mechanic...
Products: land surveying equipment,
land surveying software