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。
Stone implements included adze, arrowhead and grinder.
石器包括锛、镞、砺石等。
应用推荐