GB/T 8190.3-2003
往复式内燃机 排放测量 第3部分;稳态工况排气烟度的定义和测量方法
Reciprocating internal combustion engines--Exhaust emission measurement--Part 3: Definitions and methods of measurement of exhaust gas smoke under steady-state conditions
GBT8190.3-2003, GB8190.3-2003