... lower main shield(ing) 下部主屏蔽[层] lower mode vibration 低声调振动，低频振型振动 lower operating range control 下限控制 ...
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lower harness thread mode vibration 低频振型振动
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The analysis shows that when the frequency is lower than the critical frequencies of the shells in MWCNT, the vibration mode is almost coaxial.
研究表明，当扰动频率低于多壁碳纳米管的临界频率时，振动模态是同轴的；
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