erection, commissioning & trial operation including application of lining, insulation, supply & final painting as and where required including handling of materials at bhel / clients stores / storage yard and transportation to site, and handing over ofmain circulation cooling water supply and return line from condenser to idct including e&c of bf valve, arvs etc and any other equipment/structure required for the completion of the package, auxiliary cooling water supply line upto a-row of power house along and acw return line branch piping, including supply & installation of items as per boq at unit#3 & 4 of 2x800 mw ntpc lara stage ii project, dist. raigarh, cg