upcast ventilation pipe
upcast ventilation pipe
[矿业英汉词典]
upcast ventilation pipe上风管
是什么意思，upcast ventilation pipe的解释，upcast ventilation pipe的翻译
upcast ventilation pipe
[矿业英汉词典]
upcast ventilation pipe是什么意思，upcast ventilation pipe的解释，upcast ventilation pipe的翻译