- Toe
- Crest
- Foot
- Edge
- 120 dB (A)
- 130 dB (A)
- 140 dB (A)
- 115 dB (A)
- 90 dB (A)
- 85 dB (A)
Q) Sub-grade drilling is useful in removing ____ in opencast mine workings.
Solution:
Sub-grade drilling is useful in removing Toe in opencast mine workings.
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