overcoating
['oʊvəˌkoʊtɪŋ]
n.
为保护而涂的一层外敷层，保护涂层，大衣料子;
超敷;
饰面;
例句:
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Observe the overcoating intervals specified for the primer.
注意施工时与底漆的涂装间隔.
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Overcoating epoxy top coating.
涂刷环氧内墙面漆.
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Quartz overcoating protects the optics from the environment and allows cleaning without damage to their surface.
石英镀膜的光学器件可以防止环境对光学器件的损害,并且清洁时不破坏光学件的反射率.