James Watt invented the condensing steam engine, but his partner, Matthew Boulton, marketed and manufactured it.
詹姆斯·瓦特发明了冷凝蒸汽机，但他的合伙人马修·博尔顿制造并把它推向了市场。
James Watt invented the condensing steam engine, but his partner, Matthew Boulton, marketed and manufactured it.
詹姆斯·瓦特发明了冷凝蒸汽机，但他的合伙人马修·博尔顿制造并把它推向了市场。
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