Clean sand requirement, there should be no sawdust, stones and other sundry, particle size between 1 ~ 2 mm, Fried dry before use.
砂粒要求洁净,不应有木屑、石块等杂物,粒径在1 ~2毫米之间,使用前要炒干。
Clean sand requirement, there should be no sawdust, stones and other sundry, particle size between 1 ~ 2 mm, Fried dry before use.
砂粒要求洁净,不应有木屑、石块等杂物,粒径在1 ~2毫米之间,使用前要炒干。
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