The phrase "displace about" is correct and can be used in written English.
It means to move or shift something, usually a group of people, to a different location or situation. Example: The government's decision to build a new highway will displace about 200 families from their homes.
Modern destroyers displace about 8,000 tons, are capable of speeds of more than 30 knots, and carry crews of about 300.
This definition of a battleship in effect defined a new kind of cruiser, which would displace about 10,000 tons and would be armed with eight-inch guns.
The state began condemnation proceedings, which would displace about 55 businesses, ranging from technical schools and a dormitory to parking lots and sex shops.
Opposition groups say the flooding will displace about 12,000 people and destroy the fishing industry, but the Brazilian government maintains that the lands will not be harmed and that it is taking environmental issues into consideration.
In a statement announcing the $300 million in grants, the Energy Department estimated that the alternative-energy projects it is financing "will help displace about approximately 38 million gallons of petroleum per year".
He had been protesting against the construction of the 175-metre-high Chadín II dam planned for the Marañón river in the Amazon basin, which will displace about 1,000 people.
But the move displaced about 5,000 households, most of them African-American.
The LST displaced about 4,000 tons full load and transported about 150 troops with equipment at 10 knots.
They would have displaced about 48500 LT, nearly double the displacement of the older ships.
These displaced about 36,000 tons and carried 14-inch guns.
The tornado displaced about 700 students from an apartment complex.
