论文部分内容阅读
我国首台J522型卧式滚轮二工位离心铸管机5月28日在天水铸造锻机械总厂通过了省级鉴定验收。
China’s first J522 horizontal roller two-station centrifugal cast pipe machine passed the provincial appraisal and acceptance at Tianshui Foundry Forging Machinery Plant on May 28.