DIN EN 26157-1:1991-12 Fasteners; surface discontinuities; bolts, screws and studs subject to general requirements (ISO 6157-1:1988); german version EN 26157-1:1991
1991DIN EN 26157-1:1991-12 Fasteners; surface discontinuities; bolts, screws and studs subject to general requirements (ISO 6157-1:1988); german version EN 26157-1:1991
1991DIN EN 26157-1:1991 Fasteners; surface discontinuities; bolts, screws and studs subject to general requirements (ISO 6157-1:1988); german version EN 26157-1:1991