短語詞組短語closed precision die forging 閉式精鍛precision die forging technology 精鍛工藝方案precision stamp forging 精密模鍛precision n forging machine 精密鍛機isothermal precision die forging 等溫精密模鍛precision drop forging 精密模鍛precision hot forging die 精鍛模precision of forging parts 鍛件精度 返回 precision forging