有槽圆头螺钉

flat fillister head screw

oval countersunk fillister head wood screw

fillister head bolt【机】

fillister hexagon head bolt

oval countersunk fillister head machine screw

sash fillister【建】;sash knife【建】;

fillister head screw

fillister【木】[专业]柱上的\nflute【建】;fluting【建】;flute【建】