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Warning: fclose() expects parameter 1 to be resource, bool given in /www/wwwroot/www.wendadaohang.com/inc/function.php on line 2475 在y38滚齿轮上加工z=100,m=3,β=30°的右旋齿轮,轮刀为单头(k=1),要求选择分齿挂轮和差动挂轮 - 99问答网