Air Wet Stone Grinder 注水式气动砂轮机
stone grinder tender 石磨看管者
Grinding element and grinder stone 发明名称
fixed-stone commutator grinder 固定砂轮式换向器磨床
Figure 1.1 Ancient decorated mill stone with a hand grinder from the Yucatan.
图1.1带有装饰的古代磨石和手磨台组合，出自尤卡坦。
The grinder is to grind rubble pellet slab, natural stone and other pellet materials, and to provide small pellets material for the subsequent process.
人造石粗料粉碎机用来破碎颗粒板，天然石料及其它颗粒原料，为后序工序提供小颗粒原料。
Stone implements included adze, arrowhead and grinder.
石器包括锛、镞、砺石等。
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