helicoid的精选

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用“involute helicoid”造句大全，involute helicoid造句

用“involute helicoid”造句大全，involute helicoid造句

2018-07-06
basecylinderofinvolutehelicoidwormbasediameterofinvolutehelicoidwormThesphericalinvolutehelicoidequationanddividingsphericalhelicoidequationofgrindingwheelareestablished.Thehelicalmotionparametersandh...