Co-Founder & CEO of Lumos helmet. On a mission to make safe riding as easy as riding a bike :)

一個提供現代軍事科技資訊的專頁https://www.facebook.com/CombatInformationCenter/about/?ref=page_internal

Official account for news and updates from Medium.

19-20世紀的海軍史，還有海軍艦隻的故事。fb: https://www.facebook.com/ironclads.dreadnoughts/