Advantage 1. Chiedza: The density of general resin lenses is 0.83-1.5, nepo optical glass is 2.27 ~ 5.95.2. Kuramba kwakasimba kwekukanganisa: Kupikisa kweresin lens kunowanzo 8 ~ 10kg / cm2, kwakapetwa kanoverengeka girazi, saka haisi nyore kutyora, yakachengeteka uye yakasimba.3. Chiedza chakanaka transmis...
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