The structure, operating principle and main design points of the hopper-type automatic-feeding bending die used on a general stamping mahine are stated.是什么意思_The structure, operating principle and main design points of the hopper-type automatic-feeding bending die used on a general stamping mahine are stated.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句