Ключевые слова: bridge, compound, drawbridge, engine, engineering, exhibit, flywheel, gear, heritage, historical, hydraulics, lifting, london, lowering, machinery, mechanical, museum, navigation, obsolete, oil, old, power, preserved, pump, pumping engine, raising, river, shipping, stationary, steam engine, steel, technology, thames, tower, tower bridge, traditional, transport, twintandem, vintage, wheel,