Home / Standards / GB/T 6789-1999 GB/T 6789-1999 Active M14×1.25 spark-plugs with conical seating and their cylinder head housing M14×1.25锥座火花塞及其气缸盖安装孔 Standard Type GBT ICS 43.060.50 CCS T37 Status 现行 Issue Date 1999-11-01 Implementation 2000-08-01 Responsible Dept 工业和信息化部 Drafting Unit N/A