【化】 handling hole
flying rings; rings; the swinging ring
【机】 bail
bolt
【医】 screw
aperture; bore; foramen; hole; os; ostium; vulva
【化】 hole; opening
【医】 apertura; aperturae; aperture; bore; coel-; foramen; foramina; hiatus
mesh; opening; pore; Pori; porosity; porus; trema