This standard specifies the appearance and main dimensions of the R-type series electric light source glass bulb. This standard applies to R-type series electric light source glass bulbs.
QB/T 2049.8-1994 history
2013QB/T 2049.8-2013 Glass bulb dimensions for lamps.R series shapes
1995QB/T 2049.8-1994 Glass envelope of electric light source Dimension of R model glass envelope