中径[zhōng jìng]
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pitch diameter （螺纹的）; intermediate diameter
1. mean diameter：中心轮 central gear | 中径 mean diameter | 终止啮合点 final contact, end of contact
2. 中径什么意思
2. Pitch diam：螺纹大径:Major Diam | 中径:Pitch diam | 底径:Minor diam
3. medium diameter：medium 介质 | medium diameter 中径 | medium pressure 中等压力