DIN EN 1778:1999 Characteristic values for welded thermoplastic constructions - Determination of allowable stresses and moduli for design of thermoplastic equipment; German version EN 1778:1999
1999DIN EN 1778:1999-12 Characteristic values for welded thermoplastic constructions - Determination of allowable stresses and moduli for design of thermoplastic equipment; German version EN 1778:1999
1999DIN EN 1778:1999 Characteristic values for welded thermoplastic constructions - Determination of allowable stresses and moduli for design of thermoplastic equipment; German version EN 1778:1999