Zakłady Mechaniczne Tarnów
Later other types of Soviet-designed military equipment were also introduced: 57 mm AZP S-60 and ZU-23-2 AA guns , 2M-3M naval cannons , armament for the 2S1 Gvozdika SP howitzer , DShK , NSV and KPV heavy machine guns , as well as domestic designs . 
<triplet> 57 mm AZP S-60 <subj> 57 <obj> caliber