By constructing the BOM structure model, mathematic expression and arithmetic of the four types of Items in the multi-view mapping course is deducted.
通过建立BOM结构数学模型，推导了四种类型物料项映射规则的数学表达式和相应的算法。
By constructing the BOM structure model, mathematic expression and arithmetic of the four types of Items in the multi-view mapping course is deducted.
通过建立BOM结构数学模型，推导了四种类型物料项映射规则的数学表达式和相应的算法。
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