单词	分傳之地
释义	同Gavelkind
随便看	optical telephone optical telescope optical test optical testing optical testing and workshop techniques optical testing instrument optical testing techniques optical texture optical theodolite optical theorem optical-thermal model optical thermometry optical thickness optical thickness of the atmosphere optical thin film optical thin film deposition optical thin films optical throw optical thyristor optical time-division optical time division multiple access optical time division multiplexing optical time domain feflectomertry optical time domain feflectomertry (otdr) optical time domain feflectrometry for attenuation measurement