You take two pi times the square root 85 of R over d and you find 1.85.
2π乘以R/d的平方根,得到1。
Fuxing zipper is trying to win over and selection of talents in colleges and universities and take root in internal research and development.
而福兴拉链则尝试收揽和选拔高校专业人才，扎根企业内部搞研发。
Fuxing zipper is trying to win over and selection of talents in colleges and universities and take root in internal research and development.
而福兴拉链则尝试收揽和选拔高校专业人才，扎根企业内部搞研发。
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