"demonstration sample" is correct and usable in written English.
You can use it to refer to an object, process, or event that is being used as an example to show how something works or is done. For example, "This demonstration sample shows how to use the new software."
In this paper, a comprehensive review of the research works regarding the solar assisted heat pump system (SAHP) in the application of domestic hot water will be conducted, starting with the working principle, classification, theoretical analysis and demonstration samples.
The demonstration samples are preserved in facilities of the Department of Biology and Ecology of Kragujevac, Faculty of Science.
Participants were subject to an oral introduction on how to take saliva samples (including time and conditions of sampling, demonstration of sampling procedure, points of attention to be addressed such as no eating, drinking or brushing teeth, and cooled storage of samples) and a detailed instruction sheet was provided.
Staged in a temporary structure, the festival will have cooking demonstrations, sampling stations and a play area where children can make macaroni necklaces.
Webb joins Conrad Hotel executive chef Darnell Reed to dish out cooking demonstrations, samples and answers to audience questions.
The architecture of the implemented system is described in details together with the demonstration of sample significant analysis and forecast results obtained from the system.
A slicing demonstration with samples will be given tomorrow from 1 to 4 p.m. at Grace's Marketplace, 1237 Third Avenue (71st Street).
A screen-porch dining area allows for suburban views of Mr. Wilson's hourly leaf-blowing demonstration, while sampling freezer-to-table fare is perfect for practicing that "Mmm, I swear it's good" face.
With the basics taken care of more easily, supermarkets' space could then be devoted to creating an exciting shopping experience through demonstrations, food sampling and special events, she said.
