Coatings

例句:

• When one coating became sufficiently hard another was added, and smoked in turn, and so successive coatings were applied until a sufficient thickness was obtained. Edward W. Byrn. 十九世纪发明进展.
• The manufacture of fancy woven cloths, cassimeres, worsted coatings, etc. 威廉·亨利·杜利特. 世纪发明.

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