What is the crown type of glasses? Options: A . &nbspLaboratory apparatus grade B . &nbspOptical grade C . &nbspSealing type D . &nbspUltraviolet transmitting type

What is the crown type of glasses?

Question

What is the crown type of glasses?

Options:

A . Laboratory apparatus grade

B . Optical grade

C . Sealing type

D . Ultraviolet transmitting type

Answer: Option B
Answer: (b).Optical grade

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