The channel clamps of the two support frames can be connected to two lower transverse rods of an existing wheel chair and {TAIL ~ the joining tubes} at two sides of the battery unit is connected to the joining pipe so that the battery unit can be fixed beneath {HEAD ~ a seat} of the wheel chair 
The channel clamps of the two support frames can be connected to two lower transverse rods of an existing wheel chair and { TAIL ~ the joining tubes } at two sides of the battery unit is connected to the joining pipe so that the battery unit can be fixed beneath { HEAD ~ a seat } of the wheel chair
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