vacuum impregnating是什么意思 vacuum impregnating在线中文翻译

vacuum impregnating是什么意思，vacuum impregnating在线翻译，vacuum impregnating中文意思，vacuum impregnating的中文翻译，vacuum impregnating发音，vacuum impregnating例句，vacuum impregnating词组短语，vacuum impregnating怎么翻译，单词vacuum impregnating的意思