The phrase "are generally not suitable" is correct and usable in written English.
It can be used to indicate that something is typically inappropriate or not fitting for a particular purpose or context.
Example: "These materials are generally not suitable for outdoor use due to their sensitivity to moisture."
Alternatives: "are typically inappropriate" or "are usually unsuitable".
As a general rule, wool, silk, mohair, and non-colorfast fabrics are generally not suitable for cleaning with bleach.[3].
Moreover, these techniques are generally not suitable for investigating fatigue crack propagation under cyclical loading.
The proposed design addresses the need for a cuff device for micro-scale diameter nerve tissue for which the presently available nerve cuff devices are generally not suitable.
For example, current blockchain techniques are generally not suitable for the Internet of Things (IoT) network, because IoT devices may have to work with low computational capability or very low power (Atzori 2016).
However, there are solar peculiarities in comparison to conventional thermochemical processes – high thermal flux density and frequent thermal transients because of the fluctuating insolation-, and conventional industrial thermochemical reactors are generally not suitable for solar driven reactors.
For complex geotechnical failure mechanisms, it is often necessary to employ computationally expensive finite element methods to analyse defence and soil behaviours; however, methods available for structural reliability analysis are generally not suitable for direct application to such models where the limit state function is only defined implicitly.
Thus, this type is generally not suitable for real networks.
Interestingly, however, irrespectively of the source/type, biomass is generally not suitable for energy production.
However, such a model is generally not suitable for an airborne platform high above the ground networks.
The classical business model for bedding textiles is based on the major element of fashion and design thus the price is generally not suitable for products which offer value both to the elderly and care givers.
The experimental new material has, in theory, a huge potential for artistic applications, however, according to Surrey NanoSystem's FAQ page, "Vantablack is generally not suitable for use in art due to the way in which it's made".
