有心人可以试试, 说不定能整个专利发个小财
回答: 因为已经有规定车用喇叭如何发声,分贝多少,国内的好像还有GB。。。打破已有规定是很难的,就放弃了。不过还是心有不服。。
由 zhenleilren1
于 2024-05-24 09:19:05
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