发明申请
US20090163091A1 BOAT-PROPELLING MACHINE 失效
船用螺旋桨机

BOAT-PROPELLING MACHINE
摘要:
In a boat-propelling machine for attachment to a boat hull (200), an outer wall unit (4) is fixedly provided on a body of the machine for covering part of a cylindrical structural body (60) that is formed of metal alloy and positioned so as to be at least above a draft line during planning of the boat, and a lift force generation device (20) is provided on the outer vertical wall unit.
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