http://www.raking.cn/agv%e8%bf%90%e8%bd%bd%e8%bd%a6%e7%9a%84%e4%ba%ba%e6%80%a7%e5%8c%96%e8%ae%be%e8%ae%a1%e7%a0%94%e7%a9%b6-research-on-humanized-design-of-agv-vehicle/ hourly 1 https://wordpress.org/?v=4.3.34