The phrase "a very narrow gap" is correct and usable in written English.
You can use it to describe a small space or distance between two objects or concepts.
Example: "There is a very narrow gap between the two buildings that makes it difficult for large vehicles to pass through."
Alternatives: "a slight opening" or "a small space".
Flat heat exchanger surfaces will allow a very narrow gap between scraper and heat exchanger plate.
Such a seal permits a small air leakage through a very narrow gap between the seal lip and the counterpart; this air film both avoids contact and ensures lubrication at the seal-counterpart interface thus permitting reduced friction and wear.
During the insertion process the adhesive fills a very narrow gap over significant anchorage contact area, raising concerns that manufacturing defects may impact the structural performance of the bonded joint, namely the possible lack of adhesion resulting from inadequate preparation of the joint on site.
Our previous approach required a very aggressive maneuver, therefore we looked into alternative solutions to accomplish a task as passing through a very narrow gap without having to fly at high speed.
The difference over making Albanian an official language, the diplomat said, is "a very narrow gap, but it's very deep". Ethnic Albanian politicians have insisted that their language must be made official, while Macedonian Slav leaders have expressed fear that agreeing to this demand would set the stage for the breakup of the country along ethnic lines.
The aim of the work was to measure the very narrow gap occurring between a new radial sealing device and the counterpart during working conditions, when compressed air in the sealed volume detaches the mating surfaces, causing a small and controlled leakage flow.
In fact, the interspace between our fabricated SiNWs could not be embedded owing to the very narrow gap at around 20 nm.
What we'll do is take the spacecraft from orbiting outside the rings and dive into and orbit through the very narrow gap between the upper atmosphere and the innermost ring," Dr Spilker, from Nasa's Jet Propulsion Laboratory (JPL), told BBC News.
This new MSGC has very narrow gaps between neighboring electrodes which can considerably reduce a surface charge effect.
Blebbing motion, in contrast, allows to even squeeze through very narrow gaps and is independent of matrix degradation [ 360, 368].
