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GROUP A BASIC RAW MATERIAL CONSUMABLE

a1 fuel - oil, gas-oil and petrol a3 sf6 gas a5 carpentry articals a7 chemical products a8 anti - corrosive painting a9 locks a10 steel cables a11 black and galvanized steel pipes with accessories a13 galvanized steel structures a14 p.v.c pipes a18 refractory bricks for heaters a19 insulating calorific products