1550nm
0102030405
1550nm
Na-achọ onye nrụpụta China nke a pụrụ ịdabere na ya, onye na-ebubata ya na ụlọ nrụpụta maka ngwaahịa 1550nm kacha mma? Lee anya ọzọ! Ngwaahịa anyị 1550nm bụ ngwọta zuru oke maka mkpa gị. Kpọtụrụ anyị taa!
