Metal has testing standards: each batch of raw materials must be sampled before entering the factory to ensure that they meet the requirements; we will sample the mechanical properties and tolerances of semi-finished products at each stage, which can not only improve the qualified rate of finished products but also shorten the order production time; finished products also need to pass our strict sampling inspection, and goods can only be delivered to you after the samples are confirmed to be qualified. Our quality control center has advanced instruments to complete more comprehensive and rigorous testing tasks.