名词 topcoat:

1. a heavy coat worn over clothes in winter

topn.顶部；顶；上面；极点；陀螺adj.最高的；顶端的vt.形成顶部； 达到…的顶端； 处于…的最前头vi.总结； 超越； 高耸； 结束Topcon特强牌照相机

1. A mist coat or tie coat shall always be installed to prevent topcoat bubbling.
   为了防止面漆起泡，须先喷一薄涂层或联结层。
2. The formulation and process of epoxy primer and polyester polyurethane top finish in this system were introduced.
   介绍了该涂料体系的环氧底漆和聚酯聚氨酯面漆的配方和生产工艺。