... 2. double power head 3. multipurpose drilling machine MDL-120E Crawler Multifunctional Drilling Rig:drilling deeper, can be up to 100 ... pit, all kinds of guiding hole,various types of engineering tunnel pipe shed .3. Technical Data: Hole diameter(mm)Φ150~Φ250Hole ... (L*W*H)(mm) 5700*2100*1950 Walking wayby crawler belt, crawler drilling rig type Remark:Technical specifications are subject to change ...