rectangular orifice造句

"' slice "': the adjustable rectangular orifice, usually at the bottom of the headbox, through which the whitewater jet discharges onto the wire.
The image here on the right represents a " two dimensional wall jet " between two parallel plane walls,, where the ?obstacle ?is a quarter cylindrical portion following the flat horizontal rectangular orifice, so that no fluid at all is entrained from the surroundings along the wall, but only on the opposite side in turbulent mixing with ambient air.
It's difficult to find rectangular orifice in a sentence. 用rectangular orifice造句挺难的