The phrase "airspace within" is correct and usable in written English.
It can be used when referring to a specific area or region of airspace that is contained or enclosed by certain boundaries or conditions.
Example: "The aircraft must adhere to the regulations governing the airspace within the designated flight zone."
Alternatives: "airspace inside" or "airspace contained within".
The Federal Aviation Administration closed the airspace within two miles and 3,000 feet of altitude, while on the ground the police evacuated some homes in the nearest community, Charleston, a mile south of the site.
For the duration of the summit, which involves foreign ministers on Friday and heads of state and government on Saturday, boats will be banned along a section of the river near the stadium and light aircraft will be prohibited from flying through the country's airspace within a 62 mile (100km) radius.
The passage of high speed trains causes aerodynamic effects in tunnels, and considerable pressure transients are generated because of the restricted airspace within the tunnel.
"Why are [the Russians] coming over our airspace within just a few miles of BAE Systems in Samlesbury in my constituency?" In April, two Russian aircraft were intercepted by RAF Typhoons near UK airspace in the latest of several similar incidents over the past year.
From there, they migrate into the airspace within the alveoli to the sites of microbial invasion.
The airspace within the chamber was perfused twice for 4 min each at a flow rate of 20 25 L/min at 2 psi with the premixed gas and the sealed chamber was placed in a 37°C incubator.
The intra-acinar airspace was defined as all airspaces within the lumen of respiratory bronchioles, alveolar ducts, alveolar sacs, and alveoli.
With the advent of hyperpolarized helium-3 magnetic resonance imaging (HP 3He MRI), there is now a noninvasive method to directly visualize areas of ventilated airspaces within the lung [27 36].
Polymorphonuclear neutrophils invade airspaces within hours after birth and persist during the first weeks of life in the airways of these infants [7], [8].
"I urged him to shut down the New York airspace, and within five minutes, he'd shut down the national airspace".
On the battlefield, an enemy could create chaos and confusion simply by flooding the airspace with drones, and any U.S. bases within drone range would have to be closed, the report said.
