... of deep-foundation pit and groundwork reinforcing engineering in urban construction site, for blowing up engineering or blowing up hole etc. Alternating ... the drilling rig can also be applied for high-pressure revolving-spraying pole for construction engineering, for the support hole of tunnel tube ... 10-90or-90-10Rated rotation speed (r/min,Forward or reverse): 20,40,56,60,111,167Rated pull up force ( ...