The phrase 'key technical issues' is perfectly correct and usable in written English.
You can use it when you need to refer to a particular set of technical matters that need to be addressed. For example, "We must carefully consider the key technical issues before making any decisions."
Some key technical issues concerning the manufacturing procedure are discussed.
Key technical issues and design considerations are discussed next.
Up-front consultation will ensure that key technical issues are addressed before you conduct your modeling.
Airborne sonar target recognition involves two key technical issues: target feature extraction and classification.
We have been working on development programs focusing on two key technical issues: reliable mechanical coolers and the light-weight telescope system.
Surfacing steel decks is one of the key technical issues facing engineers during construction of long-span steel bridges.
Harrison argued that the key technical issue for the artists was the reformulation of painting and pictorial space in the wake of cubism.
When utilizing FRPs with other materials, the joining technology between them is a key technical issue because the joining methods are related to the safety of the vehicle and also restrict the vehicle design.
In particular, I also discuss different modes of genomic interactions between SP factors and NF-Y that have emerged recently, and identify a key technical issue, which needs to be taken into account in a critical evaluation of genome-wide studies.
The key technical issue is represented by use of large catheters (>6 French) [2, 3].
Another key technical issue to achieve the on-demand supply of the Si/SiO2 NW arrays is to predict the time required to reach the desired thickness of the thermal oxidation.
