{HEAD ~ A rubber locking device} for a bicycle seat bag is composed of a rubber strip which is fastened to the top of the seat bag by {TAIL ~ a clamp board}, two hook bases correspondingly provided at two sides of the seat bag for fastening to the two ends of the rubber strip 
{ HEAD ~ A rubber locking device } for a bicycle seat bag is composed of a rubber strip which is fastened to the top of the seat bag by { TAIL ~ a clamp board } , two hook bases correspondingly provided at two sides of the seat bag for fastening to the two ends of the rubber strip
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