Purification Technology Edition Security Question [047]

2017-08-26View Original

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What is the standard for supplying fresh air to the work area in a timely manner during the construction of tunnels in water conservancy projects? Answer: 3 cubic meters per person per minute. Coalification Region Purification Technology Edition – 2017 Coal Chemical Industry “My Technical Upgrades” Contest (with generous prizes) http://bbs.hcbbs.com/thread-1786290-1-1.html Registration for Chemical Engineers – Experience Sharing Event “Learning from Others’ Experiences” http://bbs.hcbbs.com/thread-1808158-1-1.html

Reply #22017-08-26

The analyzed oxygen content ranges from 19% to 22%

Reply #32017-08-26

3 cubic meters per person per minute.

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Purification Technology Edition Security Question [047]

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