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1-inch hose with 1-8 NH NFPA threads (NFPA 1963 requirement; a.k.a. "Chemical Hose Thread" and "Booster Hose Thread" [7]; the chemical hose thread term likely originates from its use on chemical fire engines, an early firefighting device used from 1872 until the 1930s that used a combination of bicarbonate of soda and sulfuric acid to force ...
a fitting that connects pipes of different diameters, genders, or threads (see § Coupling below) [10] adapter spools (also called crossover spools), used on oilfields and pressure control, have different diameters, pressure ratings or designs at each end [11] adapters to convert NPT to BSP pipe threads are available [12]
More expensive extension tubes contain electrical contacts allowing the user to use autofocus and electronically control the aperture of the attached lens. An advantage to the non-electrical tubes is their lower price. Other items like lens adapters may unintentionally have an effect similar to an extension tube.
An adapter or adaptor in genetic engineering is a short, chemically synthesized, double-stranded oligonucleotide that can be ligated to the ends of other DNA or RNA molecules. Double stranded adapters are different from linkers in that they contain one blunt end and one sticky end.
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