型号 规格
j173c-78.5 a:78.5mm b:33.5mm c:45mm
j173c-88.5 a:88.5mm b:38.5mm c:50mm
j173c-108.5 a:108.5mm b:48.5mm c:60mm
j173c-112.5 a:112.5mm b:50.5mm c:62mm
