When loading or discharging dry mud or cement，crew members should use facial respirator masks and（）.<br>A:goggles<br>B:ear plugs<br>C:soft-soled boots<br>D:fireman's outfit

When loading or discharging dry mud or cement，crew members should use facial respirator masks and（）.
A:goggles
B:ear plugs
C:soft-soled boots
D:fireman's outfit

出自：海船船员证

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