-
李宪永在每天完成正常检修任务的同时，埋头钻研起了红外线保护装置。
Li Xianyong normal every day maintenance tasks in the same time, played hard at studying infrared protection.
youdao
-
李宪永在每天完成正常检修任务的同时，埋头钻研起了红外线保护装置。
Li Xianyong normal every day maintenance tasks in the same time, played hard at studying infrared protection.
youdao