共謀低空經(jīng)濟(jì)產(chǎn)業(yè)發(fā)展、共創(chuàng)低空經(jīng)濟(jì)產(chǎn)業(yè)“朋友圈”－北京市低空經(jīng)濟(jì)產(chǎn)業(yè)聯(lián)盟邀請(qǐng)中國(guó)低空經(jīng)濟(jì)聯(lián)盟共同舉辦低空經(jīng)濟(jì)沙龍活動(dòng)