-Standards, rules of construction apply: TCVN4447-2012; ISO4427:1996; DIN8074:1999; TCVN 4070-2012; TCVN4085-2011; TCVN4453-1995 -Document the instructions attached to the contract number 0045/QB2/DB1/NCB-GOOD on 09/02/2015 between the Pmu and clean water supply for rural areas in Central Quang Binh province and venture investment joint stock company & School Safety-construction and consulting company Viwaseen built and Nghi trade. -Report on the testing of materials, devices, products are available before use. -Report on the testing of relevant construction work.
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