权威例句
Percussion hammerPERCUSSION HAMMERPERCUSSION HAMMERGlossary 3 - techniquesLINEARLY DRIVEN AND AIR-COOLED BORING AND/OR PERCUSSION HAMMERWeir Mitchell's 1859 demonstration of "a peculiar contraction"produced by a percussion hammer.Improve ROP with Hydraulic Percussion Hammer and PDC Bit in Tahe OilfieldPERFORMANCE OF NITROGEN EXPLOSION HYDRAULIC: PERCUSSION HAMMER BASED ON MEASRUEMENT OF EXPANDED KALMAN FILTERA NEW PERCUSSION HAMMER.Fluid Percussion Hammer Field Test in the Alocthonous Cretaceous Block, Eastern Venezuela ™Quantitative neural percussion hammerDrillhammer and/or percussion hammer.Rock Breaking Model Under Dynamic Load with the Application of Torsional and Axial Percussion Hammer