Civil Engineering - Tunnelling - Discussion
Discussion Forum : Tunnelling - Section 1 (Q.No. 24)
24.
The concentration of the dust particles of the size 0.5 to 5 microns adjacent to the working face should not be more than
Discussion:
1 comments Page 1 of 1.
Pankaj Rana said:
3 weeks ago
400 is the right answer.
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