短語詞組短語ductile metallic material 韌性金屬材料ductile material detail 延性物料soft ductile material 軟韌性材料rigid -ductile material 剛韌性材料dynamic fracture of ductile material 韌性介質動態(tài)損傷ductile -mode material removal 延性切削Material ductile 延性材料 返回 ductile material