mù / gōng / xiān / yòng / cū / shā / zhǐ / dǎ / mó / mù / bǎn / zài / huàn / xì / shā / zhǐ / pāo / guāng

木工先用粗砂纸打磨木板，再换细砂纸抛光。

The carpenter first sands the board with coarse sandpaper, then switches to fine sandpaper for polishing.