CA1292033C - Boring device for a lining material applied onto the inner surface of a pipe line - Google Patents

Info

Publication number

CA1292033C

CA1292033C CA 544889 CA544889A CA1292033C CA 1292033 C CA1292033 C CA 1292033C CA 544889 CA544889 CA 544889 CA 544889 A CA544889 A CA 544889A CA 1292033 C CA1292033 C CA 1292033C

Authority

CA

Canada

Prior art keywords

coil spring

tension coil

boring device

pipe line

spring

Prior art date

1986-08-19

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.)

Expired

Links

• Espacenet
• Global Dossier
• CIPO
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