短語詞組短語groove arrangement angle 花紋溝排列角度groove e angle 槽角quadratic groove angle 二次槽角included angle & groove angle 坡口角度groove angle of outside welding 外焊坡口角度angle of groove inclination 槽傾斜角angle steel groove 角鋼孔型angle of groove mode 槽形角 返回 groove angle