This is the 12584th most frequent Russian word.
кондитерских
"Confectionery" or "pastry shops".
The word 'кондитерских' is used here as the genitive plural form of the word 'кондитерская' (pastry shop), referring to multiple establishments in a descriptive sense.
Я купил торт в одной из лучших кондитерских города.
I bought a cake in one of the best pastry shops in the city.
In this sentence, 'кондитерских' is an adjective forming part of the phrase 'кондитерских условиях' to describe the type of conditions related to confectionery.
Учитель показал нам процесс приготовления карамели в кондитерских условиях.
The teacher showed us the process of making caramel in confectionery conditions.
Here, 'кондитерских' is the genitive plural form of 'кондитерская,' referring to the shops' environment in a possessive sense.