Home / Standards / GB/T 6784-1999 GB/T 6784-1999 Abolished M10×1 spark-plugs with flat seatingand their cylinder head housing M10×1平座火花塞及其气缸盖安装孔 Standard Type GBT ICS 43.060.50 CCS T37 Status 废止 Issue Date 1999-11-01 Implementation 2000-08-01 Responsible Dept 工业和信息化部 Drafting Unit N/A