catapult mechanism造句

• The middle deck housed anchors and catapult mechanisms, aircraft fuel tanks, main and auxiliary engines, food storage and rudder control.
• The Vipers are launched from a long tube in one of a Battlestar's landing bays, assisted by a powered catapult mechanism.
• The original concept envisioned by Hewitt and Sperry was a catapult mechanism or from the water ( the N-9s were seaplanes, the Flying Bomb was not ).
• A pollen catapult mechanism is present in the genera " Molopanthera " and " Posoqueria " ( tribe Posoquerieae ) that projects a spherical pollen mass onto visiting sphingidae.