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a machine can heple us travel
Sailboat racing
Child support.
It's a regular sailboat with everything a regular boat would have
depends on what kind of help
sailboat
43 ft Mason.
displacement sailboat
What kind of machine is slide
Canoe, sailboat, rowboat, barge, anything powered by evinrude.
Row boat; paddle boat; sailboat
The pilot of a hang glider hangs from a trapeze. Racing hang gliders doesn't come up often as a competitive event, though.