clean ground
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Clean Sky — Joint Undertaking is the largest aeronautical research programme ever launched in Europe for the development of breakthrough technologies to significantly increase the environmental performances of airplanes and air transport, resulting in less… … Wikipedia
Clean Air Act (United States) — Clean Air Act Full title Clean Air Act of 1963 Acronym CAA Effective Dec. 17, 1963 Citations Public Law P.L. 88 206 … Wikipedia
Ground glass joint — Ground glass joints are used in laboratories to quickly and easily fit leak tight apparatus together from commonly available parts. For example, a round bottom flask, Liebig condenser, and oil bubbler with ground glass joints may be rapidly… … Wikipedia
clean-tilled — «KLEEN TIHLD», adjective. grown on land that is kept free from other ground cover: »Cotton, corn, and tobacco are clean tilled crops, leaving the soil unprotected against the heavy monsoon rains (White and Renner) … Useful english dictionary
ground crew — ground ,crew noun count the people who clean, check, and repair aircraft or SPACECRAFT while they are on the ground … Usage of the words and phrases in modern English
Clean coal — Historically[1] used to refer to technologies for reducing emissions of ash, sulfur, and heavy metals from coal combustion; the term is now commonly used to refer to carbon capture and storage (CCS) technology. Clean coal is an umbrella term used … Wikipedia
Clean and jerk — The clean and jerk is one of the two Olympic weightlifting events (the other being the snatch). The clean portion of the lift refers to the lifter explosively pulling the weight from the floor to a racked position across deltoids and clavicles.… … Wikipedia
clean — clean1 W2 [kli:n] adj comparative cleaner superlative cleanest ▬▬▬▬▬▬▬ 1¦(not dirty)¦ 2¦(people/animals)¦ 3¦(environment)¦ 4¦(fair or legal)¦ 5¦(not offensive)¦ 6 come clean 7 make a clean breast of it … Dictionary of contemporary English
Clean coal technology — This article is about technological innovations related to clean coal. For clean coal as a general concept, see clean coal. Clean coal technology is a collection of technologies being developed to reduce the environmental impact of coal energy… … Wikipedia
Ground effect in cars — For another similarly named effect relating to aircraft, see Ground effect in aircraft. Ground effect is term applied to a series of aerodynamic effects used in car design, which has been exploited to create downforce, particularly in racing cars … Wikipedia
clean — 1. adjective /kliːn/ a) Not dirty. Are these dishes clean? b) In a condition of having been cleaned. Your room is finally clean! Ant: dirty, unclean … Wiktionary
