includes performing all operations and services of purchasing and supplying equipment and goods, materials and spare parts required, loading and transporting and unloading and delivery of all equipment and materials, materials and spare parts, performing necessary equipment construction works at the equipment workshop and Dismantling the workshop, construction and installation, pre-commissioning, functional testing, training and other services as described in the terms of the contract in the form of PC to replace the network of gas transmission pipelines with Maron