|
CN111927306A
|
|
Large-aperture impactor with adjustable air inflow
|
|
CN111911078A
|
|
Reaming type rotary wing drilling tool
|
|
CN111927307A
|
|
Air distribution device of impactor and matched impactor
|
|
CN110578471A
|
|
non-excavation reaming impacter
|
|
CN110439467A
|
|
A kind of reaming block formula concentric simultaneous casing drilling tool
|
|
CN108915582A
|
|
A kind of drilling machine for rotary digging drill bit and impactor switching construction
|
|
CN107099767A
|
|
A kind of explosion drill bit Technology for Heating Processing
|
|
CN106065761A
|
|
A kind of air inflow adaptive energy-saving impact device
|
|
CN106216946A
|
|
A kind of processing method of rotor reaming block
|
|
CN106078115A
|
|
A kind of reverse circulation impactor inner casing joint processing technique
|
|
CN105921630A
|
|
Assembling process of concentric drilling tool hole reaming sleeve assembly
|
|
CN105909169A
|
|
Pile-forming rock-entering drilling tool system of rotary drilling rig
|
|
CN105063320A
|
|
Method for preparing high air pressure impactor piston
|
|
CN104989279A
|
|
A high air pressure drill bit
|
|
CN104453704A
|
|
Top hammer type impact rotary power head of hydraulic drilling machine
|
|
CN104389515A
|
|
Impact hammer for hydraulic drilling rig
|
|
CN103334693A
|
|
Down-hole hammer piston and machining process thereof
|
|
CN103352110A
|
|
Processing technology of medium-wind-pressure percussion bit
|
