Home / Standards / GB 6851-1986 GB 6851-1986 Abolished pH Basic line--General ruls for certification pH 基准试剂定值通则 Standard Type GB ICS 71.040.30 CCS G61 Status 废止 Issue Date 1986-09-06 Implementation 1987-08-01 Responsible Dept 中国石油和化学工业联合会 Drafting Unit N/A