Mineral oil and a varnish are then applied, and the instrument is then hand-sanded down to a flat finish.

接着涂上矿物油和油漆，并且用手将乐器抛光，得到平滑的外观。

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Mineral oil and a varnish are then applied, and the instrument is then hand-sanded down to a flat finish.

接着涂上矿物油和油漆，并且用手将乐器抛光，得到平滑的外观。

youdao