lightning quick(hyphenated if used before a noun) Incredibly fast; too quick to keep up with. Did you see that martial arts expert? His kicks were lightning quick! My brother has a lightning-quick wit. thefreedictionary.comAlexander Demidov)
NSR(North Sea Resins one-part, cure-on-command resins can be used underwater or surface as an adhesive, filler or sealant. Fix wet pipes, boat hulls, tanks, etc Павел Дмитриев)
flow rate(The rate by which water is discharged from an outlet. For example, the standard flow rate of a showerhead is 2.5 gallons per minute. Found on encyclo.co.ukAlexander Demidov)