97-20-17S(431)规格参数
相关型号
97-20-18P 9720-18P 97-20-18P(431) 97-20-18P-431 97-20-18S 97-20-18S(431) 97-20-18S-431 97-20-19P 9720-19P 97-20-19P(431)