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Low-temperature ultrasonic motor using piezoelectric single crystal substrate
The low temperature environment is widely used as the process of manufacturing, inspection, and storage, and the measurement environment using analytical instruments is widely used. In particular, the generalized extremely low temperature environment below 77K is the boiling point of nitrogen, which is considered an important environment for measuring physical properties.
2021-12-09
“约战普陀”游泳系列挑战赛今开赛
“约战普陀”游泳系列挑战赛暨“新金环杯”PTSA夏季游泳联赛总决赛今天在普陀体育中心游泳馆鸣枪开赛。 本次比赛的参赛选手由在前期四个分站赛各项冠军组成,总共决出32个项目的总冠军,其中吴凯旸打破3项赛会纪录,李文昊打破1项赛会纪录。
新民网
2021-09-26
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