This standard specifies the basic requirements and test methods for trial frames used to install trial lenses. This standard is applicable to all kinds of trial frames of headband type, bracket type and spectacle frame type with temples and nose pads. This standard does not apply to comprehensive optometry.
GB/T 15464 Gmeneral-purpose specification for the packaging instrumentation products
GB/T 2828.1 Inspection procedure by count sampling part 1: Lot by lot inspection sampling plan retrieved by acceptance quality limit (AQL)*, 2013-02-15 Update