树脂砂铸件,且经过回火处理,确保机床结构稳定,不易变形,长期保持精度稳定、img src="//www.znpla.com/img1/img/daily/2025/02/18/164345_675410_procont.png" title="164345_675410_procont.png" alt="image.png" width="677" height="555" style="width: 677px; height: 555px;"/>