machine screw with oval countersunk fillister head

例句：

1. 1. Theengineer used a machine screw with ovalcountersunk fillister head to tightenthe bolts on the door.
   工程师使用一个带有椭圆形沉头填料头的机械螺钉来紧固门上的螺栓。
2. 2. The constructionworker replaced the machine screw with ovalcountersunk fillister head after theaccident.
   事故发生后，建筑工人更换了带有椭圆形沉头填料头的机械螺钉。
3. 3. Thetechnician was asked to inspect the machine screwwith oval countersunk fillisterhead for any signs of wear or damage.
   技术人员被要求检查带有椭圆形沉头填料头的机械螺钉，以查看是否有磨损或损坏的迹象。