open-wire carrier telephone 中文意思是什麼
open-wire carrier telephone
解釋
明線載波電話-
Grading standard for quality of carrier telephone equipment. open wire high band 3 - channel carrier telephon equipment
載波電話設備質量分等標準.明線高頻3路載波電話設備 -
Grading standard for quality of carrier telephone equipment. open wire high band 12 channel carrier telephone equipment
載波電話設備質量分等標準.明線高12路載波電話設備
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