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ball screw and rolling ball guide, is precisely modeled as a dynamic friction characteristic due to the rolling friction, as well as a well-known static friction modeling by Stiction, Coulomb, and viscous frictions. The proposed system modeling has been verified by comparative studies using a ...
Stationery Wholesale Logo Pen Precise Gel Ink Rolling Ball Stick Pens, Extra Fine Point, Green, Find Details and Price about Roller Roller Pen from Stationery Wholesale Logo Pen Precise Gel Ink Rolling Ball Stick Pens, Extra Fine Point, Green - Qingdao...
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Pilot Hi-tecpoint V5 RT: This premium retractable rolling ball pen has a patented extra fine precision tip to deliver smooth, skip-free writing every time. Unparalleled performance for ultra-smooth writing Precision Point: You'll love the clean lines & smooth ink delivery of this retractable roll...
Pilot Hi-tecpoint V5 RT: This premium retractable rolling ball pen has a patented extra fine precision tip to deliver smooth, skip-free writing every time. Unparalleled performance for ultra-smooth writing Precision Point: You'll love the clean lines & smooth ink delivery of this retractable roll...
The invention provides a heat treatment technology for improving the surface hardness of a precise rolling ball bearing. The heat treatment technology includes the steps of quenching-tempering treatment, processing-shaping, cleaning-drying, and nitriding treatment in sequence. The heat treatment technology...