(1)無線送信機を操作する人
(2)someone who operates a radio transmitter
さらに詳しく
(1)機械や作業員の効率を高める専門家
(2)an expert in increasing the efficient use of machines and personnel
(1)鉱山の建造や操作にかかわる技師
(2)an engineer concerned with the construction and operation of mines
