不需要任何特殊工具或设备即可现场更换阀座。

The seat is field replaceable without any special tools or equipment.

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而在现场表演时，吉他手有可能为每首曲子的演出而更换一把新吉他。

And during live shows, guitarists may swap out for a new guitar with every song.

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变压器更换需要工作人员去现场勘测。

Change of transformer must be examined by the staff.

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变压器更换需要工作人员去现场勘测。

Change of transformer must be examined by the staff.

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