Recent Content by guxiangdeyun

  1. guxiangdeyun
    Post

    Batteries and New Battery Technologies

    will you tell me about some marine propellers suppliers in the world thank you
    Post by: guxiangdeyun, Apr 7, 2008 in forum: Boat Design
  2. guxiangdeyun
    Post

    New propulsion sytems for ships

    it's helpful to me, thank you to all of you.
    Post by: guxiangdeyun, Apr 7, 2008 in forum: Propulsion