Home / Standards / GB/T 7234-1987 GB/T 7234-1987 Abolished Measurement of roundness--Terms, definitions and parameters of roundness 圆度测量 术语、定义及参数 Standard Type GBT ICS 17.040 CCS J04 Status 废止 Issue Date 1987-02-04 Implementation 1988-01-01 Responsible Dept N/A Drafting Unit N/A