DE752163A - - Google Patents

Info

Publication number

DE752163A

DE752163A DE752163A DE 752163 A DE752163 A DE 752163A DE 752163 A DE752163 A DE 752163A

Authority

DE

Germany

Prior art keywords

walls

sleeve

stiffening

heating element

reich

Prior art date

Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)

Pending

Links

• Espacenet
• Global Dossier
• DPMA
• Discuss

• 238000010438 heat treatment Methods 0.000 claims 3
• XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims 2
• 239000002184 metal Substances 0.000 claims 2
• 229910052751 metal Inorganic materials 0.000 claims 2
• 229910000831 Steel Inorganic materials 0.000 claims 1
• 238000000137 annealing Methods 0.000 claims 1
• 230000015572 biosynthetic process Effects 0.000 claims 1
• 229910052742 iron Inorganic materials 0.000 claims 1
• 238000004519 manufacturing process Methods 0.000 claims 1
• 238000000034 method Methods 0.000 claims 1
• 230000002787 reinforcement Effects 0.000 claims 1
• 239000010959 steel Substances 0.000 claims 1