विलियम कुलेन कौन थे

know all facts रेफ़्रिजरेटर का आविष्कार किसने किया था , खोज करने वाले का नाम , Refrigerator was discovered by in hindi ? question : which scientist invented ‘Refrigerator’ first time ? answer : famous scientist named ‘William Cullen’ is known for discovery of Refrigerator in the year ‘1748’. प्रश्न…