71543 ⎘
Marine propulsion by muscle power; Other apparatus for converting muscle power into propulsive effort for bow-facing rowing by using an inverting mechanism between the handgrip and the blade, e.g. a toothed transmission
Sub-classes:Reversing gear drive
#2Boat rowign device
#3Portable rowing/exercise device
#4Bow-facing rowing system
#5Gears for reversing rowing motion for oars
#6Reverse rowing device