... long working life Match: pneumatic rock drill 1,DTH hammer CDTH hammer introduction Two series of DTH bit are available: High air ... COPCO and Ingersoll-Rand. Application: earthwork and stonework construction, mining, water well drilling, construction engineering, and so on. Markets: our products ... such as Australia, Canada, USA and France.2,DTH hammer CDTH hammer photos DTH hammer CDTH hammer