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می توان گفت مهم ترین عامل تفاوت میان سنباده های فلاپ و صفحات ساب در ساختار و ترکیب آن می باشد. برخلاف صفحه سنگ های ساب که از یک سطح صاف و یک نواخت و از دانه های ساینده به هم چسبیده تشکیل شده است ، دیسک های فلپ از حلقه ای از سنباده های که ساختار همپوشانی دارد تشکیل شده است. وجه تشابه بین این نوع سنباده و صفحه سنگ ، دانه های تشکیل دهنده آنها است که ه...
![whatsapp](/images/whatsapp.png)
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