... personnel replacement cost 人员更换成本 piece-production cost 单件生产费用 planned cost variance of materials 材料计划成本差异 ...
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piece production cost 单件生产费用
Experiments indicates that the harrow piece of nodular cast iron in squeezing casting has the features of excellent mechanical properties and low production cost.
经试验，挤压铸造的球墨铸铁耙片力学性能好，生产成本低。
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