ịwa akwa, ịnwale, na ịhazi mgbakọ granite maka ngwaahịa ngwaọrụ idowe waveguide anya bụ ọrụ siri ike.Agbanyeghị, site na ntuziaka na ntuziaka kwesịrị ekwesị, enwere ike mezue usoro ahụ nke ọma.N'isiokwu a, anyị ga-atụle nzọụkwụ-site-nzọụkwụ gu ...
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