底漆用于出白金属表面，防止其生锈。（）<br>A:Topside paint is applied to a bare surface to give protective against rust.<br>B:Undercoat is applied to a bare surface to give protection against rust.<br>C:Primer coat is applied to a bare surface to give protection against rust.<br>D:Topcoat is applied to a bare surface to give protection against rust.

底漆用于出白金属表面，防止其生锈。（）
A:Topside paint is applied to a bare surface to give protective against rust.
B:Undercoat is applied to a bare surface to give protection against rust.
C:Primer coat is applied to a bare surface to give protection against rust.
D:Topcoat is applied to a bare surface to give protection against rust.

出自：船舶水手证

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