2017年航天军工指数累计涨幅-16.17%，跑输上证指数22.84%。在所有SW一级行业中，SW军工2017年表现倒数第4，仅好于SW综合、SW传媒、SW纺服。军工板块PE已经回调87.1X,回到历史中枢，PB目前回调到2.74X，已经接近行业下轨2.5X，接近历史性大底（2X）。

2017年年初至年中，涨跌幅为-14.97%，处于倒数第四位2016年初至今，涨跌幅为-34.27%，处于倒数第三位

A nuclear-powered naval vessel uses nuclear energy to power its propulsion system and is constructed with a nuclear power plant placed inside a section of the ship, which is coded as the reactor compartment. The components of the nuclear power plant include a high-strength steel reactor vessel, heat exchanger, steam generator, and associated piping, pumps, and valves. Each nuclear reactor plant contains over 100 tons of lead shielding, a part of which is made radioactive through contact with a radioactive material or by neutron activation of impurities in lead.

PPE is used to protect workers from hazards in various industries such as construction, mining, manufacturing, and oil and gas. With growing industrial production globally, PPE is employed in almost all industries. This report provides insights into PPE used for aerospace and aviation industry. The global growth in the industry calls for increased protection for the workforce in various operations.