IMPLEMENTATION SERVICE OF THE STAIRCASE PRESSURIZATION SYSTEM FOR THE EXECUTION OF THE WORK BALANCE TECHNICAL FILE IMPROVEMENT OF THE ADMINISTRATIVE SERVICES OF THE NATIONAL UNIVERSITY OF BARRANCA IN THE LA FLORIDA URBANIZATION, DISTRICT OF BARRANCA, PROVINCE OF BARRANCA, DEPARTMENT OF LIMA COMPONENT 1- INFRASTRUCTURE, WITH SNIP CODE N 314566 (EXPIRED)