……. विश्व का प्राचीनतम (अभी भी चालू) 1855 ई. में बना भाप इंजन है। ………… is the world's oldest (still in operation) steam engine built in 1855 A.D.

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……. विश्व का प्राचीनतम (अभी भी चालू) 1855 ई. में बना भाप इंजन है। ………… is the world's oldest (still in operation) steam engine built in 1855 A.D.