concentrate at

concentrate someone or something at something

to cause people or things to gather at a place; to cause people or things to convene or converge at a place. You shouldn't concentrate all the guards at one entrance. The general concentrated all the big guns at the entrance to the valley.
See also: concentrate
References in periodicals archive ?
Nine-month testing of pipe made with the new concentrate at pressures exceeding 1250 psi at 73 F for water pipe and 140 F for gas reportedly show that the 45% concentrate performs as well as the standard 35% formulation on the market.
TSX VENTURE:DIB) is pleased to announce a record month in terms of production and sales of concentrate at its pilot-mining program at the Bolivar mine in Chihuahua Mexico.
Two-mil-thick LDPE film samples containing this concentrate at letdown ratios up to 12:1 reportedly have met the requirements of MVSS 302.
A further 3% copper reported to the nickel concentrate at 11% recovery, to bring total copper recovery to 85%.
Several passes through the Centrifugal Jig will be necessary to produce a 90 percent total heavy mineral concentrate at the mine site.
In addition, recent bench-scale lab work has been successful in reducing the lead in the bulk concentrate by gravity methods thereby upgrading the copper content of the bulk concentrate to +25 per cent copper (from 20 per cent) and concomitantly yielding a saleable lead concentrate at 50 per cent lead.