coarse half round file 粗半圆锉
middle half-round file 中半圆锉
half round file 半圆锉
smooth half-round file 细半圆锉
coarse e half round file 粗半圆锉
half round bastard file 半圆粗锉
half-round middle file 半圆中锉
half-round coarse file 半圆粗锉
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N a file having a semicircular cross-section 半圆锉 [engineering]
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