Self - contained breathing apparatus ( SCBA ) may be required to prevent asphyxiation of rescue personnel.

可能要求有自给式呼吸器 ( SCBA ),以防止救援人员窒息.

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In emergency situations self - contained breathing apparatus ( SCBA ) must be used.

紧急形势下,必须使用自给式 呼吸器 .

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In emergency situations self - contained breathing apparatus ( SCBA ) may be required.

在紧急情况下,可能要求有自给式呼吸器.

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Self - contained breathing apparatus ( SCBA ) may be required.

可能需要用自给式呼吸器.

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