jonny2008 wrote:
你說「心理層面」是我...(恕刪)
我蠻推薦這篇文章所寫的
http://www.nordicgroup.us/chain/
尤其是這一段
It's easy to go into business selling chain lubricants. Just buy some small bottles and fill them from five gallon bottles of industrial lubricants. Create a fancy name, and convince bicycle shops to stock your product