1. Pụrụ iche ngwaọrụ iji belata mgbanwe nke focal ntụpọ size kpatara mgbanwe nke pre focal beam size, emeputa nke laser ọnwụ usoro na-enye ụfọdụ pụrụ iche ngwaọrụ maka ọrụ ịhọrọ: (1) Collimator.Nke a bụ usoro a na-ahụkarị, ya bụ, collimator bụ ...
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