"these designations" is correct and can be used in written English.
For example, "These designations are used to identify different types of products."
The point is that designating a wave is not the same as designating water, yet these designations do not "obstruct" each other.
I resist most of these designations.
And Ms. Snyder doesn't dispute these designations.
Federal guidance for such actions as mobilization of vaccines is based on these designations.
These designations may be appealed to the District of Columbia Circuit.
These designations are so specific, Porritt said, that a search can become counterproductively narrow.
These designations could bring tax credits to owners like the Rosenblooms if they restored their facade.
These designations were henceforth widely used, and Hoar became a recognized spokesman of the Conscience Whigs.
Each pair will have Student A and Student B (assign these designations or ask the students to assign themselves).
"These designations highlight the threat posed by IM not only to Western interests, but to India, a close U.S. partner.
These designations derive from the method through which each instrument produces sound and are based upon physical descriptions.
