https://klingerturkey.com/dn1700-hinged-expansion-joint-with-904l-bellows/
DN1700 Hinged Expansion Joint with 904L Bellows - KLINGER Turkey
Nov 22, 2021 - DN1700 hinged expansion joints with 904L (1.4539) bellows were manufactured from 3 x 0.6mm layers for low spring rates. Addition of copper to 904L gives it...
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