| 摘要 |
<p>A grinding machine is provided which has a plurality of grinding heads (42) upon which the weight of the machine rests to urge the grinding heads into engagement with the surface there beneath, each head (42) being composed of a plurality of individual grinding stones (44) and each grinding stone (44) being connected to a body of its head by a resilient mounting, the stones in each head being arranged and constructed so that the area of operation of each head overlaps with any neighbour in order that an entire surface can be ground.</p> |
