As textile industry being the background, at first the paper discusses the definition, importance and estimation of PSC, then presents a production function including economic factors—capitaL laser;
本文以纺织工业为背景，首先探讨产品结构变化的涵义、重要性及其度量方法；
As textile industry being the background, at first the paper discusses the definition, importance and estimation of PSC, then presents a production function including economic factors—capitaL laser;
本文以纺织工业为背景，首先探讨产品结构变化的涵义、重要性及其度量方法；
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