Thin edge(about 1 mm thickness)slitting with automatic and manual grindstone keep knife edge sharp and make silt paper smooth and tidy.是什么意思_Thin edge(about 1 mm thickness)slitting with automatic and manual grindstone keep knife edge sharp and make silt paper smooth and tidy.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句