hr

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HR

Prefix used to designate a star as listed in the Harvard Revised Photometry , 1908.

hr

(organic chemistry)

HR

On drawings, abbr. for “hour.”

hr

(networking)
The country code for Croatia.
References in periodicals archive ?
Matt Hale, International Sales Manager at HRS Heat Exchangers explains how the new HRS-Rotex fits into the existing FIRS product line: "The HRS-Rotex is complementary technology to the other scraped surface technology we offer - The HRS Unicus.