petroleum engine developed by otto, historical, digitally enhanced reproduction of a 19th century model - 推進力 幅插畫檔、美工圖案、卡通及圖標引擎
five medium freighters deccelerate from cruising speed as they near their destination. - 推進力 幅插畫檔、美工圖案、卡通及圖標太空船
gear, ball bearing, pinion, business, 3d, mechanics, wheel, tooth, metal, silver, steel, commercial, drive, gearbox, teeth, component, top view, signal box, forces, power, background, mechanical engineering, machine, tram mission, transmission, car, heavy - 推進力 幅插畫檔、美工圖案、卡通及圖標
two spacecraft return from a mission to a spaceport in orbit around an alien planet and its moon.. - 推進力 幅插畫檔、美工圖案、卡通及圖標
two spacecraft takeoff from a colony which produces vegetation on a desert planet. - 推進力 幅插畫檔、美工圖案、卡通及圖標
trevithick’s improved flywheel locomotive of 1803 — early high-pressure steam engine with large rear flywheel and geared driving wheels - 推進力 幅插畫檔、美工圖案、卡通及圖標
a manned orbital maintenance platform docked with a manned reusable crew capsule. - 推進力 幅插畫檔、美工圖案、卡通及圖標
a dedicated lunar shuttle descends toward a manned outpost on the moon's southern hemisphere. - 推進力 幅插畫檔、美工圖案、卡通及圖標
a concentrated gamma ray strikes a planet, increasing the core pressure literally tore it open. - 推進力 幅插畫檔、美工圖案、卡通及圖標星球, 拆除 - 破壞
