Vízemelő ketyerék:

Spiral pump at workshop
http://www.youtube.com/watch?v=hjcGWPk-zI8&feature=related

WATERWHEEL PUMP
http://www.youtube.com/watch?v=LbklIccv2CI&feature=related

waterwheel pump refurb
http://www.youtube.com/watch?v=YWAfnqH1w2g&feature=related

water wheel Water Pump (4.4MB)
http://www.youtube.com/watch?v=LWedIS5teJI&feature=related