1. Ndeapi marudzi emidziyo yelenzi iripo? Zvishandiso zvechisikigo: dombo rekristaro, kuomarara kwepamusoro, zvisiri nyore kugaya, zvinogona kutumira ultraviolet mwaranzi, uye ine birefringence. Artificial zvinhu: zvinosanganisira inorganic girazi, organic girazi uye optical resin. Inorganic girazi: Inonyungudutswa kubva kune silica, calciu ...
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