This is the 9169th most frequent Russian word.
серпуховском
"Serpukhovskom" refers to something related to Serpukhov, a city in Russia.
Here, 'Серпуховском' is an adjective modifying 'музее', indicating that the museum is located in or is related to Serpukhov.
Серпуховском музее можно найти много интересных экспонатов.
In the Serpukhov museum, one can find many interesting exhibits.
In this sentence, 'серпуховском' functions as an adjective to describe the market, specifying its association with Serpukhov.
На серпуховском рынке продают свежие овощи и фрукты.
Fresh vegetables and fruits are sold at the Serpukhov market.
Here, 'Серпуховском' is an adjective attached to 'районе', indicating the district's relation to Serpukhov.