Home › Blog › Buying Guide › How Smart Engineers Assess a Pre-Owned, Used, Second-Hand, Surplus Jinan Grace G3020 – CNC 5 Axis Router made in China Before Purchase Here’s a complete professional guide on how smart engineers evaluate a pre-owned, used, second-hand, or surplus Jinan Grace G3020 CNC 5-Axis Router made in China before purchase — ensuring technical, mechanical, and economic soundness....