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NF L22-277 (02/1968) (R2008) Drilled cheese head screws, fully threaded, for temperatures above 260 degrees C.
NF B49-411 (01/1968) Chemical analysis of refractories. Silica materials, silico-argillaceous and argillaceous materials. Determination of silicon (method by insolubilisation in hydrochloric acid medium).
NF L22-251 (02/1968) (R2008) General purpose 100 degrees countersunk head screws with A.I.C.M.A. Cross recess.
NF B49-412 (01/1968) Chemical analysis of refractories. Silica materials, silico-argillaceous and argillaceous materials. Determination of aluminium.
NF B49-414 (01/1968) Chemical analysis of refractories. Silica materials, silico-argillaceous and argillaceous materials. Determination of titanium.
NF B49-413 (01/1968) Chemical analysis of refractories. Silica materials, silico-argillaceous and argillaceous materials. Determination of iron.
NF B49-415 (01/1968) Chemical analysis of refractories. Silica materials, silico-argillaceous and argillaceous materials. Determination of manganese.
NF B49-419 (01/1968) Chemical analysis of refractories. Argillaceous and silico-argillaceous materials. Determination of silicon (method by insolubilisation in perchloric acid medium).
NF B49-417 (01/1968) Chemical analysis of refractories. Silica materials, silico-argillaceous and argillaceous materials. Determination of calcium and magnesium.
NF V04-402 (01/1968) Agricultural products. Meat and meat products. Determination of total fat content.
NF P37-404 (12/1967) (R2012) Roofing accessories. Propped gutter brackets.
NF P37-414 (12/1967) (R2007) Roofing accessories. Stamped sheet or strip metal bolt clamps with inserted pin.