What is "proton-pm"

OJSC Proton-PM ( Russian: ) is a Russian engine and heavy machinery manufacturing plant. It is located in the city of Perm, in the Perm Krai, on the bank of the Kama River. It started in 1958 as the specialized branch of Plant No. 19 named after I. V. Stalin for the manufacturing of the RD-214 rocket engine. In 1964 it was given made a separate entity then known as Second Production. In the later years, it has branched intro producing gas turbine power plants.