The gate wool sticks to the keyhole parting surface of the cover tool, causing a gap in the parting surface and causing flash defects on the keyhole parting surface.
The gate thread adheres to the cover tool keyhole parting surface, causing gaps in the parting surface and resulting in flash defects on the keyhole parting surface
Gate wool stuck to the parting surface of cover tool, resulting in the gap of parting surface, resulting in flash defect on the parting surface of keyhole.