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The productivity of SMF is restricted by several factors with traditional MCVD process.
以传统的MCVD工艺生产单模光纤，生产率受到限制。
Based on the knowledge of producing optical fiber preform, MCVD process was selected as the main research object.
在了解光纤预制棒加工工艺的基础上，选择M CVD法为研究对象。
Objective To explore the relationship of the mean color vessels density (MCVD) with TNM stage and pathologic microvessel density (MVD) in rectal cancers.
目的探讨直肠癌彩色血流平均密度(MCVD)与TNM分期、微血管密度(MVD)的关系。
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