While most of the information in this section refers to natural stone, there is an alternative called Manufacturedstone (or Agglomerate stone).
虽然在本节的大部分信息，是指天然石木，还存在另一种被称为制造石(或聚团石)。
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"What we need from these sites now are evidence of the stone tools themselves, so we can see if they were manufactured or were natural stones that happened to be used for butchery," he added.
It is also suitable for grinding and polishing glass, wood, stone and other products, resin grinding wheel is manufactured, novel materials emery cloth.