鹅头形钢板头部设计有椭圆形螺丝孔内侧面设计有较深的槽纹；

Goose head shaped steel plate head has oval screw bore, there is deep slot on the inner side;

youdao

鹅头形钢板头部设计有椭圆形螺丝孔内侧面设计有较深的槽纹；

Goose head shaped steel plate head has oval screw bore, there is deep slot on the inner side;

youdao