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我厂生产100吨米自升塔式起重机的液压缸体长3425毫米,内径260毫米。孔径为φ260D3,图纸要求孔的椭圆度和圆锥度允差0.03毫米,在1000毫米内不直线度允差0.05毫
I plant the production of 100 tons of self-elevating tower crane hydraulic cylinder length 3425 mm, an inner diameter of 260 mm. Diameter of φ260D3, drawing requirements Ovulation and conicity tolerance of 0.03 mm, within 1000 mm is not straightness tolerance of 0.05 milliseconds