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This idea here is to solve two problem.
One is when you got a flat maybe you
dont notice that. The valve core have two different colour. When you see orange
part you will know that you got a flat and the green part means you filled it with full
The other problem is that when you blow up your bicycle tyres you may bothered
by when the bicycle wheel is full of air. So does the same. Two part of colour will
make your attention. Green is mean it full of air,orange is not.
Deng Haowen Zhou weiming Jin Tingting Huang Bolong