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DIN 974-2:1991-05 Diameters of counterbores for hexagon bolts, screws and nuts; manufacturing dimensions
DIN 10183-1:1991-05 Microbiological analysis of milk; determination of Escherichia coli; method with liquid medium
DIN 10183-2:1991-05 Microbiological analysis of milk; determination of Escherichia coli; membrane-agar method
DIN 31653-1:1991-05 Plain bearings; hydrodynamic plain thrust bearings under steady-state conditions; calculation of pad thrust bearings
DIN 31654-1:1991-05 Plain bearings; hydrodynamic plain thrust bearings under steady-state conditions; calculation of tilting-pad thrust bearings
DIN 31654-2:1991-05 Plain bearings; hydrodynamic plain thrust bearings under steady-state conditions; functions for calculation of tilting pad thrust bearings
DIN 31653-2:1991-05 Plain bearings; hydrodynamic plain thrust bearings under steady-state conditions; functions for calculation of pad thrust bearings
DIN 38402-18:1991-05 German standard methods for the examination of water, waste water and sludge; general information (group A); sampling of water from mineral springs and spas (A 18)
DIN 38402-18:1991-05 German standard methods for the examination of water, waste water and sludge; general information (group A); sampling of water from mineral springs and spas (A 18)
DIN 44926-1:1991-05 Ceramic parts for electric heating elements; multiple hole tubes; dimensions
DIN 44926-2:1991-05 Ceramic parts for electric heating elements; open multiple hole tubes; dimensions
DIN 44926-3:1991-05 Ceramic parts for electric heating elements; helical discs with connecting parts; dimensions