This standard specifies the appearance and main dimensions of the T-type series electric light source glass bulb. This standard applies to T-type series electric light source glass bulbs.
QB/T 2049.9-1994 history
2013QB/T 2049.9-2013 Glass bulb dimensions for lamps.T series shapes
1995QB/T 2049.9-1994 Glass envelope of electric light source Dimension of T model glass envelope