基本解釋[機(jī)] 半圓銼詞組短語短語middle half -round file 中半圓銼half -round d middle file 半圓中銼smooth half -round file 細(xì)半圓銼half-round file更多詞組英英字典柯林斯英英字典 a file having a semicircular cross-section half-round file劍橋字典half-round file柯林斯字典專業(yè)釋義機(jī)械工程半圓銼半元銼