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這個(gè)起什么作用?一般是什么材料? |
點(diǎn)評(píng)
幫忙給別人做的,已經(jīng)不在我這里了。不過由于我做的振動(dòng)系統(tǒng)小,用的5mm的橡膠帶,感覺有點(diǎn)硬。但是能用!
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