Queen Mary mounted eight BL 13.5-inch Mk V guns in four twin hydraulically powered turrets, designated 'A', 'B', 'Q' and 'X' from bow to stern.
Flare fittings, are metal to metal compression seals deformed with a cone nut and pressed into a flare mating.
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Harry Franklin Vickers was called the "Father of Industrial Hydraulics" by ASME.
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Pipe fittings, the fitting is screwed in until tight, difficult to orient an angled fitting correctly without over or under tightening.
It had a conventional tailwheel undercarriage with its mainwheels mounted on single legs and retracting inwards into the wing and fuselage underside, hydraulically driven via a pair of outboard struts.
Poclain produced excavators, and was leader on the French and world market thanks to a revolutionary hydraulic motor.
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