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GOST R 59978.2-2022
Chimneys. Thermal and fluid dynamic calculation. Part 2. Chimneys serving more than one heating appliance
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€10
GOST 9853.23-96
Sponge titanium. Spectral method for determination of silicon, iron, nickel
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GOST 8790-79
Rectangular parallel keys with screwing on the shafts. Dimensions
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€10