.

[oeos (單車單車~~~)]

http://www.dsproshop.com/Reports/MotorBikeEngineIllustrationBook/4-StrokeEngineW
orkingTheory.htm

http://hk.geocities.com/henry_yu_84/engine.html

--

        就快樂吧 人生不快樂 還要求什麼呢?

--
※ 發信站: 批踢踢實業坊(ptt.cc) 
◆ From: 139.175.230.6