Science and technology
詹姆斯·瓦特為蒸汽機發明獨立冷凝器 詹姆斯·瓦特为蒸汽机发明独立冷凝器
Zhān mǔ sī wǎ tè wèi zhēng qì jī fā míng dú lì lěng níng qì
James Watt erfindet den unabhängigen Kondensator für die Dampfmaschine
Artist's recreation of James Watt inventing the separate condenser for the steam engine, c. 1765. © Photos.com/Getty Images