成本同等差

【经】 equal difference in cost

成本的英语翻译：

costing
【经】 cost; cost,insurance,freight by plane; degression

同等的英语翻译：

coequal; coequality; coordination; equivalence; on a par; on an equal basis
parity
【机】 equivalence

差的英语翻译：

differ from; difference; dispatch; errand; mistake