选用上好的无缝钢管,切割,焊接,打磨,抛光,电镀,才能成型,的拿破仑小炮,威力惊人,好玩的不要不要滴详情看视频http://m.toutiao.com/i6234842040388026881/?tt_from=weixin&utm_campaign=client_share&app=news_article&utm_source=weixin&iid=3397162360&utm_medium=toutiao_android&wxshare_count=11&pbid=15102166789&from=singlemessage&isappinstalled=0