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—铸造—蠕虫状石墨铸铁工艺稳定性的试验················································……(1一1)蠕虫状石墨铸铁—一种新型的铸造材料···············……?’’···············……(1一
- Casting - worm-like graphite cast iron process stability test ············································ ·········································································································································································· ·············……(1 a