Personnel working with refrigeration systems, and subject to the exposure of refrigerants should wear （）.<br>A:face shield<br>B:a respirator<br>C:rubber gloves<br>D:an all purpose gas mask

Personnel working with refrigeration systems, and subject to the exposure of refrigerants should wear （）.
A:face shield
B:a respirator
C:rubber gloves
D:an all purpose gas mask

出自：海船船员证

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