The drones have existed for long, but the high cost and the lack of technology have restricted the use of drone in the oil and gas industry. However, with technological advancement, the drones have come a long way and now are more reliable and provide cost-effective solutions to the oil and gas operators, globally. Drone inspection now makes it possible to access areas of oil and gas constructions that otherwise may pose health, safety, and environmental risks in a fast and safe way. Drones have several economic and environmental benefits that have enabled oil and gas companies to improve efficiency, reduce costs, and improve competitiveness. Generally, the drones are used in all phases of oil and gas activities and have the potential to support the extraction, production, and distribution. Drone provides a cost-effective and safe solution in existing and new onshore and offshore sites. In particular, the drones can help oil and gas companies to ease out the aerial, underground, and undersea inspection activities. In addition to providing visual images, they can carry out other functions, such as creating 3D maps of prospective sites and surrounding and water sampling.

宏观经济及中游制造业承压情况下，轨道交通建设逆周期调节作用凸显。我们判断全年随新基建拉动投资预期逐渐释放，全年轨交投资额大概率重回8000 亿元高位。同时随轨交通车里程基数增加，未来几年有望打开轨交存量市场。

报告分析了国内外航空发动机行业的基本情况，2016 年航发集团正式成立，2017年我国两机专项正式实施，有效促进了航空发动机的研发进程。目前我国第三代军用发动机逐步成熟，新型发动机进入攻关阶段。而我国民用航空发动机坐拥全球最大民航市场，未来发展潜力巨大。给予行业投资评级“推荐”。

年初至今中证军工指数上涨14.91%，跑赢上证综指15.42%，跑输创业板指7.05%。我们在1 月5 日发布的兴业军工观察曾指出，对一季度军工板块行情表示乐观，但板块整体β弱于创业板。截止目前观点获得较好验证。展望后市，我们建议自下而上选择军工投资方向，以基本面确定、成长优势突出、估值修复空间显著的标的为基础，并兼顾资金聚集效应显著的主题投资方向。

3月9日晚间，我国成功发射一颗北斗三号地球静止轨道卫星，预计北斗三号系统最后一颗卫星将于5月发射。北斗三号组网在即，北斗系统实现从区域到全球的跨越，未来产业规模将快速增长。