The phrase "a concealed manner" is correct and usable in written English.
It can be used to describe a way of doing something that is hidden or not easily visible.
Example: "He spoke in a concealed manner, making it difficult for anyone to understand his true intentions."
Alternatives: "a hidden way" or "a secretive manner."
"The cellular phone must be carried in a concealed manner that does not interfere with authorized equipment".
These laws versions of them have been enacted in more than forty states allow people to carry a handgun in public in a concealed manner.
These laws — versions of them have been enacted in more than forty states — allow people to carry a handgun in public in a concealed manner.
"In light of our nation's extensive practice of restricting citizen's freedom to carry firearms in a concealed manner, we hold that this activity does not fall within the scope of the Second Amendment's protections," the judges ruled.
This tube, however, was connected to another in a concealed manner such that dropping solids in it would raise the water level in the tube containing the piece of meat.
Strong pressure is also exercised indirectly and in a concealed manner by big Italian security organizations that include both police forces and some police unions.
The study plans called for 713 patients to be randomized in a fully concealed manner (i.e. blinded to patient, study staff, sponsor personnel, etc).
The firearms must be carried in concealed manner.
These weapons can be freely bought and carried in concealed manner by anybody above 18.
The answer, in America, is both surprisingly rarely (it is no crime at all to purchase an AR-15 assault rifle, or, in many states, to carry a concealed weapon into all manner of places) and surprisingly often (see Aurora, Tucson, Virginia Tech, and our gun-homicide rate, higher than that of any other industrialized nation).
The purpose of the video, a message at the beginning states, is to investigate "the possibility that an individual, hand-cuffed behind his back, may or may not have the ability to use a concealed firearm in a manner that would give rise to his or her death".
