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Either style should be rated to reduce the noise level below 85 decibels.
Either style should be rated to reduce the noise level below 85 decibels.
[[file:wellsite-safety_fig1.jpg|thumb|{{figure number|1}}Typical self-contained breathing apparatus (SCBA). (Photo © Scott Aviation.]]
[[file:wellsite-safety_fig1.jpg|thumb|{{figure number|1}}Typical self-contained breathing apparatus (SCBA). Photo © Scott Aviation.]]
===Gas monitors===
===Gas monitors===