CN105178884A
|
|
Lifting and pressing device of truck-mounted drilling rig
|
CN105178888A
|
|
Hydraulic drill rod clamper
|
CN105113563A
|
|
Double winch control system of continuous wall grab bucket and control method of double winch control system
|
CN104989694A
|
|
Safety control system for multi-gear speed of rotation of horizontal directional drilling machine power head
|
CN104790871A
|
|
Rotary drilling rig power head and rotary drilling rig
|
CN104833540A
|
|
Cantilever type tunneler whole machine test device
|
CN104879059A
|
|
All-rotation angle adjusting mechanism of multifunctional drilling machine
|
CN104832173A
|
|
High-pressure water sealing device for heading machine and heading machine
|
CN104692272A
|
|
Winch pressurization control device as well as control method and rotary drilling rig of winch pressurization control device
|
CN104695854A
|
|
Rotary drilling rig capable of realizing positive and negative circulation pneumatic down-hole hammer construction method
|
CN104695855A
|
|
Power head mechanism of down-hole hammer drill
|
CN104695872A
|
|
Multilayer drill pipe structure of pneumatic down-hole hammer
|
CN104727744A
|
|
Working device special for construction of dive-hole hammer of rotary drilling jig
|
CN104695856A
|
|
Power driving device for down-hole hammer drill construction
|
CN104832082A
|
|
Pneumatic DTH hammer reverse circulation slagging construction process for rotary drilling rig
|
CN104695882A
|
|
Three-channel multifunctional water tap of pneumatic down-hole hammer
|
CN105041246A
|
|
Direct-reverse circulation DTH hammer transfer structure
|
CN104790457A
|
|
Electric and hydraulic control method for positive flow system and application of electric and hydraulic control method to hydraulic grab
|
CN104695936A
|
|
Automatic counting control device of drill rods for horizontal directional drilling machine
|
CN104632070A
|
|
Power head multi-gear mode control device and method of rotary drilling rig and rotary drilling rig
|