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We study the molecular filament WB 673 which is located at a distance of 1.8 kpc in the giant molecular cloud G174 + 2.5. Observations of ammonia radiolines NH3 (1,1), (2,2) and (3,3) were carried out in 2019 at the Effelsberg observatory (Germany). The parameters of the lines were determined, maps of the integrated intensities of ammonia in dense clumps WB 668, WB 673, S233-IR and G173.57+2.43 were obtained. The column density of ammonia and the kinetic temperature of the gas were obtained. An analysis of the hyperfine structure anomalies of the NH3 (1,1) lines was carried out.

Study of the filament WB 673 in ammonia radiolines