concrete surface cleaning
41ultrasonics — /ul treuh son iks/, n. (used with a sing. v.) the branch of science that deals with the effects of sound waves above human perception. [1930 35; see ULTRASONIC, ICS] * * * Vibrational or stress waves in elastic media that have a frequency above… …
42farm building — ▪ agriculture Introduction any of the structures used in farming operations, which may include buildings to house families and workers, as well as livestock, machinery, and crops. The basic unit of commercial agricultural operation,… …
43Duct (HVAC) — A round galvanized steel duct connecting to a typical diffuser Fire resistance rated …
44Trench drain — A trench drain (also channel drain, line drain, slot drain, linear drain or strip drain) is a specific type of floor drain containing a dominant through or channel shaped body. It is used for the rapid evacuation of surface water or for the… …
45MythBusters (2011 season) — Country of origin Australia United States Broadcast Original channel Discovery Channel Original run …
46Water pollution — Raw sewage and industrial waste flows across international borders New River passes from Mexicali to Calexico, California. Water pollution is the contamination of water bodies (e.g. lakes, rivers, oceans and groundwater). Water p …
47Drilling mud — In geotechnical engineering, drilling mud, also known as spud mud (when beginning the drilling process), is a drilling fluid used to drill boreholes into the earth. Often used while drilling oil and natural gas wells and on exploration drilling… …
48Mediaspree — The original Mediaspree logo, with its slogan, Anchor Site (of the) Future Mediaspree is one of the largest property investment projects in Berlin. It aims to establish telecommunication and media companies along a section of the banks of the… …
49Grinding wheel — Grinding wheels A grinding wheel is an expendab …
50Dowel bar retrofit — sawcuts A dowel bar retrofit befor …
