steam-tight
71Battlecruiser — Battlecruisers were large warships in the first half of the 20th century that were first introduced by the British Royal Navy. The battlecruiser was developed as the successor to the armoured cruisers, but their evolution was more closely linked… …
72Oil shale — For the scientific technical journal, see Oil Shale (journal). Not to be confused with Shale oil or Tight oil. Oil shale Sedimentary Rock Combustion of oil shale Composition …
73Royal Dutch Shell — plc Type Public limited company Traded as LSE:  …
74Poppet valve — A poppet valve is a valve consisting of a hole, usually round or oval, and a tapered plug, usually a disk shape on the end of a shaft also called a valve stem. The shaft guides the plug portion by sliding through a valve guide. In most… …
75Operation Plowshare — Not to be confused with the anti nuclear Plowshares Movement. The 1962 Sedan plowshares shot displaced 12 million tons of earth and created a crater 320 feet (100 m) deep and 1,280 feet (390 m) wide. Project Plowshare was the overall United… …
76List of Tesla patents — Below is a list of Tesla patents. Dr. Nikola Tesla was an inventor who obtained around 300 patents [Snezana Sarbo, [http://www.tesla symp06.org/papers/Tesla Symp06 Sarboh.pdfNikola Tesla s Patents] , Sixth International Symposium Nikola Tesla,… …
77Overall — This article is about bib and brace overalls, shortalls, boilersuits. For the loose above the knee coat like protective garment called an overall in parts of the UK and Ireland, see Smock frock or Lab coat. For other uses, see Overall… …
78Chicago Tunnel Company — Under the streets of Chicago, pre 1906. Locale Illinois Dates of operation 1906–1959 T …
79Preston railway station — Infobox UK station name = Preston manager = Virgin Trains locale = Preston borough = Preston code = PRE platforms = 8 usage0405 = 3.085 usage0506 = 3.246 usage0607 = 3.418 latitude = 53.7560 longitude = 2.7072 years = 31 October 1838 events =… …
80History of the petroleum industry in Canada (oil sands and heavy oil) — Canada s oil sands and heavy oil resources are among the world s great petroleum deposits. They include the vast oil sands of northern Alberta, and the heavy oil reservoirs that surround the small city of Lloydminster, which sits on the border… …
