- cross bit
- button bit
- rotary roller bit
- button drag bit
Category: Drilling and Blasting
- Bit
- Drill
- Adaptor
- None of these
- Impact action
- Rotary action
- Both (a) & (b)
- Cutting and ploughing
- Bit
- Adaptor
- Drill
- None of these
- P-wave
- S-wave
- Rayleigh wave
- Radio wave
- time period
- frequency
- energy
- wavelength
- Only in solid
- Only in liquid
- Only in air
- Both solid and liquid
- By burying under ground
- By throwing in water
- by burning them throwing in fire
- cannot be destroyed
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- THE MINES RESCUE RULES, 1985 (60)
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