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One Safety Question per Day 2021.7.15

2021-07-15View Original

Thread Content

When entering a confined space for work, it is necessary to determine what range the oxygen level should be within in order to carry out the work: () A、19.5%-20.8% B、5%-15% C、10%-18%
Reply #22021-07-15
A、19.5%–20.8%
Reply #32021-07-15
A、19.5%–20.8%
Reply #42021-07-15
A、19.5%–20.8%
Reply #52021-07-15
A、19.5%–20.8%

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