This standard specifies the appearance and main dimensions of the P-type series electric light source glass bulb. This standard applies to P-type series electric light source glass bulbs.
QB/T 2049.7-1994 history
2013QB/T 2049.7-2013 Glass bulb dimensions for lamps.P series shapes
1995QB/T 2049.7-1994 Glass envelope of electric light source Dimension of P model glass envelope