... materials price standard 原材料价格标准 materials quantity standard 材料数量标准 Direct materials quantity standard 直接材料数量标准 ...
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Nowadays, more and more dope materials for ball playground are manufactured. The price of ground dope differs from its capability and ground standard.
目前，球类场地面层的新型材料越来越多，不同类型的场地标准所采用的面层材料在性能上有所侧重，价格差异也较大。
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