| 单词 | sealing material |
| 例句 | DEFINITIVE EXAMPLES 权威例句〔undercoat〕A coat of sealing material applied to a surface before the outer coats, as of paint, are applied.内涂层：在上漆或其它涂层之前涂于表面的密封材料美国传统〔undercoat〕The sealing material used for this purpose.内层涂料美国传统 |
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