Metrograph
[metrəʊɡrɑ:f]
解釋/意思:
(n.) An instrument attached to a locomotive for recording its speed and the number and duration of its stops.
艾德蒙編輯
[metrəʊɡrɑ:f]
(n.) An instrument attached to a locomotive for recording its speed and the number and duration of its stops.
艾德蒙編輯