字典網>> 英漢字典>> V開頭詞條>>variation of estimated cost of materials的意思 漢英字典variation of estimated cost of materials中文翻譯：【經】 原料估計成本差額字典網variation of estimated cost of materials字典網相關詞條：variation principle variational method variation problem variation of order variation from standard method variational variation variational monitor variation from budget variation margin