... 25 4>Installed Dust extractor Drill Rig, Portable Drilling Rig, Rotary Drilling Rig, Crawler Drill Rig:Features:1. Dust extractor ... hydraulic system and ensuring safety and credibility of drill carriage's operation.Specifications: ModelHC725BRock hardnessf=6~20Bore ... Air CompressorHG375M-10Dust extractor Installed Crawler drill machine, Drill Rig,Portable Drilling Rig,Rotary Drilling Rig,Crawler ...