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  2. D&H Distributing - Wikipedia

    en.wikipedia.org/wiki/D&H_Distributing

    D&H Distributing was founded as Economy Tire and Rubber, a tire retreading company, established by brothers-in-law David Schwab and Harry Spector. In 1921, the company began selling wholesale parts for automobile service industry, adding crystal radios by 1926 and moving into a distribution capacity by signing with radio manufacturer Philco.

  3. D.H. Griffin Companies - Wikipedia

    en.wikipedia.org/wiki/D.H._Griffin_Companies

    D.H. Griffin Companies is a group of six independently owned but integrated companies that perform contract demolition as well as environmental and site development services. It was founded in 1959 and is headquartered in Greensboro, North Carolina .

  4. File:D&H newspaper ad.pdf - Wikipedia

    en.wikipedia.org/wiki/File:D&H_newspaper_ad.pdf

    Short title: English: New York Tribune.(New York, NY) 1914-06-07. Image title: English: Page from New York Tribune (newspaper). [See LCCN: sn83030214 for catalog record.]. Prepared on behalf of Library of Congress, Washi

  5. de Havilland - Wikipedia

    en.wikipedia.org/wiki/De_Havilland

    The de Havilland Aircraft Company Limited (/ d ə ˈ h æ v ɪ l ən d /) was a British aviation manufacturer established in late 1920 by Geoffrey de Havilland at Stag Lane Aerodrome Edgware on the outskirts of north London.

  6. de Havilland Moth Minor - Wikipedia

    en.wikipedia.org/wiki/De_Havilland_Moth_Minor

    DH.94 Moth Minor Coupe at Portsmouth Airport in September 1954. The Moth Minor was designed as a low-wing monoplane to replace the biplane Moth series, and was intended to give similar performance with less power, and without the need for rigging of the biplane's tensioners and struts.

  7. Dihydroergotamine - Wikipedia

    en.wikipedia.org/wiki/Dihydroergotamine

    Dihydroergotamine (DHE), sold under the brand names D.H.E. 45 and Migranal among others, is an ergot alkaloid used to treat migraines. [7] It is a derivative of ergotamine . It is administered as a nasal spray or injection and has an efficacy similar to that of sumatriptan .

  8. Hydraulic diameter - Wikipedia

    en.wikipedia.org/wiki/Hydraulic_diameter

    For the limiting case of a very wide duct, i.e. a slot of width b, where b ≫ a, and a is the water depth, then D H = 4a. For a fully filled duct or pipe whose cross-section is a convex regular polygon , the hydraulic diameter is equivalent to the diameter D {\displaystyle D} of a circle inscribed within the wetted perimeter .

  9. 2,4-Dichlorophenoxyacetic acid - Wikipedia

    en.wikipedia.org/wiki/2,4-Dichlorophenoxyacetic_acid

    2,4-Dichlorophenoxyacetic acid is an organic compound with the chemical formula Cl 2 C 6 H 3 OCH 2 CO 2 H.It is usually referred to by its ISO common name 2,4-D. [4] It is a systemic herbicide that kills most broadleaf weeds by causing uncontrolled growth, but most grasses such as cereals, lawn turf, and grassland are relatively unaffected.