本标准适用于固定式、船用、机车用、工业用柴油机（拖拉机和联合收割机用柴油机除外）和气体燃料发动机的进气门和排气门。 本标准不适用于由铸造毛坯加工成的各种气门以及交通运输用柴油机气门。 This standard applies to fixed, marine, locomotive, industrial diesel engines (except tractors and combine harvesters with diesel engines) and gas engine intake and exhaust valves. This standard does not apply to all kinds of valves processed by casting rough and diesel engine traffic transport valves.