| 摘要 |
<p>A shaped diamond wheel (1), at certain height, determined by both the type of grinding wheel which is being used and the working stage, is provided with a rotating feeling pin (2), consisting of a metal element a few millimetres high, suitable for the function it has to fulfil, which projects for few hundreths af a millimetre with regard to the shape of grinding wheel, the rotating feeling pin not interfering with the working of stone, with the exception of very small portion of stone (3) which come into contavt with the rotating feeling pin (2).</p> |
