backing vacuum pump是什么意思、英文翻译及中文解释
backj.com//tags-4798-0.html" target="_blank" >ing vacuum pump
词语: backing vacuum pump
解释: 初级真空泵
词典: 电信专业英汉词典
backj.com//tags-4798-0.html" target="_blank" >ing vacuum pump
词语: backing vacuum pump
解释: 初级真空泵
词典: 电信专业英汉词典