The helicopter deck of a ship must be marked with the units identification，appropriate aiming circles，and a continuous line on the perimeter which is（）.<br>A:8 inches wide<br>B:16 inches wide<br>C:24 inches wide<br>D:32 inches wide

The helicopter deck of a ship must be marked with the units identification，appropriate aiming circles，and a continuous line on the perimeter which is（）.
A:8 inches wide
B:16 inches wide
C:24 inches wide
D:32 inches wide

出自：海船船员证

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