'substantially flat' is a correct and usable phrase in written English.
It typically refers to a surface or an object that is nearly flat, but not completely so. For example, "The terrain was substantially flat, but with occasional rolling hills."
As can be appreciated by the skilled artisan, substantially flat keyboards, such as membrane keyboards, do not provide the tactile feel that is desirable for a keyboard.
The graphene platelet ribbons are substantially flat, but when made thin by exfoliation, they can be curved, curled, or buckled indicating a single flake or a stack of a few carbon sheets [21, 22].
A plateau honing is a kind of metal removal process, which leaves a substantially flat or plateau finish with much greater bearing area, while maintaining a cross hatch pattern of valleys for oil retention.
Reviewing our recent studies of this system, we discuss slow light and critical coupling phenomena: for a properly adjusted contra-directional coupling, the bands become substantially flat in a sizable area of the dispersion diagram, opening various perspectives.
Design criteria are to achieve a substantially flat coupling together with high directivity over the desired band.
This is because the LAN data is in a higher frequency band where the characteristic impedance is substantially flat and mostly resistive.
At present, 3D cell migration hence remains a poorly understood subject with many key characteristics of cell migration differing substantially between flat 2D surfaces and different 3D environments [ 342, 358, 362, 368].
In contrast, two of the designed compounds, AF-71 and AF-80, violate the envelope substantially but exhibit flat binding profiles against the mutant panel.
In general, the effect does not seem to vary substantially by recipients' flat-type or gender, though there is suggestive evidence that SSS recipients who are more financially prepared for retirement/have higher income may spend more on health-related consumption (results available on request).
In a two-plane relief, however, the silhouette is left flat and substantially unaltered except for the addition of surface detail.
X-ray diffraction (XRD) spectra of the W- 110) peak reveal that broadening of the Full W- 110at Half Maximum (FWHM) for micro-engineered sampeak is substantially smallereveal corresponding flathatrfaces.
