单项选择题

Boilers and cylinders are（）.

A.raw metallic products
B.finished metallic products
C.consumable products
D.Manufactured goods of large Size

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单项选择题

A.raw materials
B.consumable products
C.finished metalic products
D.raw metallic products

单项选择题

A.are forbidden
B.are allowed
C.can be used
D.are usually used

单项选择题

A.hazardous cargo
B.non-hazardous cargo
C.food product
D.consumable product