Unpacking the mystery of wobbly suitcase syndrome
China Daily | Updated: 2017-07-01 08:18
You are rushing to catch a train or plane and suddenly the suitcase you're pulling starts to rock from wheel to wheel, threatening to flip over.
Tens of millions of travelers suffer this annoyance every day, but up to now, nobody could say exactly why.
Poor design? Substandard construction? Faulty technique?
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