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A new project is proposed in order to obtain direct data on the value of charmed-particle production cross section in interactions of cosmic ray hadrons on lead nuclei at average energy Eh ≈ 75 TeV in the forward kinematic cone and to determine a contribution of prompt muons to the overall flow of superhigh energy muons within EAS at mountain altitudes. The experiment will be carried out at the Tien Shan High Mountain Research Station (TSRS) located at an altitude of 3340 m a.s.l. It will clarify the nature of weakly absorbed hadronic component of cosmic rays (so-called "long-flying component"), which was previously observed in a number of experiments with cosmic rays including those performed at the TSRS. Besides, anomalies and nearby sources of superhigh energy PCR will be searched within the experiment by scanning the celestial sphere and applying a high-sensitive difference method. To achieve these objectives, a new "HADRON-55" hybrid setup representing a two-storey coordinate calorimeter of 55 m 2 in area and 1050 g/cm 2

HADRON-55 complex setup for study of hadron interactions within the central part of EAS cores