It can provide theoretic base ground for the mechanism using high frequency.

为该连铸机结晶器振动机构采用高频率振动提供依据。

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Using high frequency electric needle or electric knife to remove wet wart.

采用高频电针或电刀切除湿疣。

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Using high frequency electric needle or electric knife to remove wet wart.

采用高频电针或电刀切除湿疣。

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