Should the delivered equipment is of poor quality or non-compliant with the terms of this Contract, Quality Certificates, Technical Specification, mentioned in the certificate of equipment or any other documents, the Seller shall remedy the revealed deficiencies or replace the failed parts at his own cost during 30 days after signature of Act about the revealed defecrs between the parties; the exception is the cases when the defects took place after handing the equipment over to the Buyer due to violation by the Buyer of the directions for use or storage of the equipment or actions of the third Parties or force-majeure. Should the Buyer needs any constituent parts of long-time manufacturing for the repair works the period can be prolonged as agreed by the Buyer.