... small, so have no constringency, slanting and evil, back fire to transform, change countenance an etc. circumstance, don't ... models: Four modes----single, automatic, precision, and conventional, which adapt to different operations and accuracies.6.several types of T-gun ... : stainless steel, H08 alloy steel, spring steel, tool steel and appropriate grinding thickness of h work-piece material.Stainless ...