- The piston is an important part of high air-pressure DTH hammer.
- It can direct design of large diameter DTH hammer and bit,improve application effect of DTH hammer.
- The results indicate that although the impact frequency of DTH hammer decreased somehow, the impact power increased.
- With reference to the experiment results,the DTH hammer concentric simultaneous casing drilling tool is considered to have extensive applicati...
- According to the exploration problems in an open-pit mine,a new drilling method using reverse circulation DTH hammer drill is put forward.
- Transmission, built in the top drive power head, has two speed range? High and low. It can meet the requirements of both DTH hammer drilling and carbide bit drilling.