lever arm of internal forces
81Bogie — This article is about wheeled wagons and trolleys. For Bogey, see Bogie (disambiguation). US style railroad truck with journal bearings in journal boxes …
82petroleum production — Introduction recovery of crude oil and, often, associated natural gas from the Earth. petroleum is a naturally occurring hydrocarbon material that is believed to have formed in deep sedimentary (sedimentary rock) beds from animal and …
83Musgrave non-dead-centre engine — Park Street Mill engine in the Bolton Steam Museum …
84Joachim von Ribbentrop — Infobox Officeholder name = Joachim von Ribbentrop imagesize = small caption = order = Reich Minister of Foreign Affairs term start = February 4, 1938 term end = April 30, 1945 president = Adolf Hitler Führer chancellor = Adolf Hitler predecessor …
85Northern Counties Committee — The Northern Counties Committee (NCC) was a railway that served the north east of Ireland. It was built to Irish gauge (1,600 mm (5 ft 3 in)) but later acquired a number of 914 mm (3 ft)  narrow gauge… …
86RJ Tilney & Co — HistoryIn April 1836 Thomas Tilney and his second son George set up a firm for the purpose of dealing in stocks and shares, with offices at 7, Water Street. Sharebroking was not Mr Tilney s first business. He had followed his father into the… …
87No. 618 Squadron RAF — Mosquito B Mark IV development aircraft, DK290/G of the Aeroplane and Arma …
88de Havilland Mosquito operational history — Mosquito B XVI of 571 Squadron, 1944 The de Havilland Mosquito served in many roles during and after the Second World War. Mosquito equipped squadrons were asked to perform medium bomber, reconnaissance, tactical strike, anti submarine warfare… …
