自行车简史

of the long, shock-absorbing spokes, the ride they provided was much more uncomfortable than any of the high-wheel designs. These designs competed with each other, your choice being the high-wheel’s comfort or the safety’s safety, but the next innovation tolled19) the death of the high-wheel design.
　　The Pneumatic20)-Tired Safety
　　The pneumatic tire was first applied to the bicycle b
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