一根頭發直徑0,01毫米,擰兩百下一個毫米。輪胎磨了5個毫米就該換了。所以可以擰1000下。我覺得肯定不止一千下。應該至少能擰幾萬下。所以擰一下,兩下,對胎的磨損可以忽略不記。
一根頭發直徑0,01毫米,擰兩百下一個毫米。輪胎磨了5個毫米就該換了。所以可以擰1000下。我覺得肯定不止一千下。應該至少能擰幾萬下。所以擰一下,兩下,對胎的磨損可以忽略不記。
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