အမည်
အမျိုးအစား
မျက်နှာဖုံး / တန်ဖိုးအတိုင်းအတာ
တိုင်းတာ
- Moderate climate
- Cold climate
- Temperate and cold climate
- Tropical climate
- Marine moderately cold climate
- General climatic performance (except sea)
- Temperate climate
- General climatic marine version
General
- Rotary drilling
- Rotary-percussion drilling
- Percussion drilling
- Vibration drilling
- Flame jet drilling
- Discharge-impulse drilling