DIN 30658-2:1999-12 Materials for the subsequent sealing of underground gas mains - Part 2: Materials for the subsequent sealing of joints in underground gas mains; safety requirements and testing
1999DIN 30658-2:1999-12 Materials for the subsequent sealing of underground gas mains - Part 2: Materials for the subsequent sealing of joints in underground gas mains; safety requirements and testing
1999DIN 30658-2:1999 Materials for the subsequent sealing of underground gas mains - Part 2: Materials for the subsequent sealing of joints in underground gas mains; safety requirements and testing