बैरोमीटर
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thumb|bairomitar bairomitar (aangrezi:Barometer) ek vaijnanik upakaran hai. bairomitar ka avishkar ee. tiraseli (itali) ne varsh 1644 mean kiya tha. yah upakaran vayu dab mapane ke kam mean ata hai.
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sanbandhit lekh
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varnamala kramanusar lekh khoj
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