For example, as for coated screw, the coating and the core metal are two homogeneous materials.

例如带有镀层的螺钉，镀层和内部金属为两种均质材料。

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For extra durability it features carbide diff balls and a titanium nitride-coated diff screw.

为额外的耐用性，它的特点碳化物差异球和氮化钛涂层差异螺钉。

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If possible, screw in the junction box and head of the Department points Vaseline coated to prevent rust.

如果可能的话，在接线盒的螺丝和线头处涂上点凡士林，以防再生锈。

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