Fire protection regulations for towing vessels allow all of these types of fuel piping，EXCEPT（）.<br>A:steel<br>B:aluminum in an aluminum-hulled vessel<br>C:schedule 80 fire resistant plastic pipe<br>D:nickel-copper，copper-nickel or annealed copper

Fire protection regulations for towing vessels allow all of these types of fuel piping，EXCEPT（）.
A:steel
B:aluminum in an aluminum-hulled vessel
C:schedule 80 fire resistant plastic pipe
D:nickel-copper，copper-nickel or annealed copper

出自：海船船员证

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