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After a bit of discussion with Aleksorsist, she mentioned having ultrasonically cleaned the board prior to sending it to me. Sonication of MEMS and oscillators is risky due to the potential for floating structures to resonate at the frequency of the applied ultrasonic energy and be damaged, so I recommended not sonicating future ThunderScopes regardless of whether it ultimately turned out to be the root cause of this device’s failure or not.
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委员长会议决定，将上述草案等提交常委会会议审议。
g: (a.g + b.g) / 2,