[国外标准] SAE J997-2000 Spark Arrester Test Carbon
[国外标准] SAE J548-2-2001 Spark Plug Installation Sockets
[国外标准] SAE J548-1-2000 Spark Plugs
[国外标准] SAE J342-1991 SPARK ARRESTER TEST PROCEDURE FOR LARGE SIZE ENGINES
[国外标准] SAE J2162-1998 SPARK PLUG HEAT RATING CLASSIFICATIONS