| 摘要 |
Two layers of heat hardenable resins are formed through two steps processes. The adherent basis of polishing particles is made tight. Coating layers to enlarge grinding activity and substrate treatments are formed by double-pressing to make them porous to the utmost. A fricative noise and erosion rate are considerably slower than any other buffing wheel made of P.V.A. Thus the above described method has the length of use and the efficiency in grinding increase.
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