6. Materials:
All materials used for construction must ensure adequate regulations on technical standards in accordance with the technical design documents are approved, the certificate of quality of the manufacturer and certificates of laboratory samples, in compliance with the current regulations of the State, was approved by the Supervision consultant and investor before construction.
7. Construction work:
Before the start of construction, the contractor shall determine the cardiac gland plugging in the field, measurement of cross sectional survey. If there is a discrepancy with the design, the Contractor immediately with the investor to take measures to handle.
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