rough; coarse
Example Sentences
经过高级技工用超细金相砂纸的数道手工打磨，原本粗糙生硬的铸铁构件变得平滑如镜。
jīng guò gāo jí jì gōng yòng chāo xì jīn xiàng shā zhǐ de shù dào shǒu gōng dǎ mó, yuán běn cū cāo shēng yìng de zhù tiě gòu jiàn biàn dé píng huá rú jìng.
After several rounds of manual polishing by senior craftsmen using ultra-fine metallographic sandpaper, the originally rough and stiff cast iron components became as smooth as a mirror.
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