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Launcher, 2.75-inch rocket, seven-tube, reloadable, reusable; 7-tube 70 mm (2.75”) rocket launcher XM157A 7-tube 70 mm (2.75") rocket launcher; not compatible with Mk 66 rocket motor; USAF LAU-32A/A XM157B XM157A variant; longer launch tubes, capable of further mounting an XM118 dispenser XM158/M158
The QF 2.95-inch mountain gun was the designation given by the British to a Vickers 75 mm calibre gun. It was originally produced for the Egyptian Army . It was taken into British service in the late 19th century to provide the 'movable armament' at some coaling stations .
Writers who refer to "7-pounders" in World War I are in fact referring to this 2.5-inch (64 mm) gun. Romania bought 36 of these guns in 1883–1884, being designated in the local military nomenclature as "63 mm Armstrong mountain guns model 1883".
A hole punch, also known as hole puncher, ... The diameter of the holes varies between manufacturers, with typical values being 1 ⁄ 4 to 5 ⁄ 16 inch (6 to 8 mm).
The thicknesses vary first by 1 ⁄ 32 inch in higher thicknesses and then step down to increments of 1 ⁄ 64 inch, then 1 ⁄ 128 inch, with the final increments at decimal fractions of 1 ⁄ 64 inch. Some steel tubes are manufactured by folding a single steel sheet into a square/circle and welding the seam together. [12]
A popular collectible model is the Keuffel & Esser Deci-Lon, a premium scientific and engineering slide rule available both in a ten-inch (25 cm) "regular" (Deci-Lon 10) and a five-inch "pocket" (Deci-Lon 5) variant. Another prized American model is the eight-inch (20 cm) Scientific Instruments circular rule.