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凡嘉 asked in 科學其他:科學 · 1 decade ago

打氣筒的機構功能

請問:

打氣筒的機構功能.理論基礎是什麼?

麻煩請提供詳細解說.網址!!

thank

Update:

那個網站我查過了

還有別的網站嗎?

thank~

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