yupeifeng2004 发表于 2020-9-4 13:45:13

ISO 6336-1-2019

ISO 6336-1-2019 Calculation of load capacity of spur and helical gears —Part 1:Basic principles, introduction and general influence factors

admin 发表于 2020-9-5 10:29:01

谢谢您的分享,金币已奖励!
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