gōng / rén / yòng / mó / shā / jī / bǎ / mù / bǎn / biǎo / miàn / dǎ / mó / de / hěn / guāng / huá工人用磨砂机把木板表面打磨得很光滑。The worker used a sander to make the surface of the wooden board smooth.