JPH03130486U - - Google Patents

Info

Publication number

JPH03130486U

JPH03130486U JP3880890U JP3880890U JPH03130486U JP H03130486 U JPH03130486 U JP H03130486U JP 3880890 U JP3880890 U JP 3880890U JP 3880890 U JP3880890 U JP 3880890U JP H03130486 U JPH03130486 U JP H03130486U

Authority

JP

Japan

Prior art keywords

buried pipe

tube body

horizontal shaft

propulsion method

collar

Prior art date

1990-04-10

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.)

Granted

Links

• Espacenet
• Global Dossier
• Discuss

• 238000000034 method Methods 0.000 claims description 3
• 230000003014 reinforcing effect Effects 0.000 claims description 3
• 238000003780 insertion Methods 0.000 claims 2
• 230000037431 insertion Effects 0.000 claims 2
• 230000002093 peripheral effect Effects 0.000 claims 1
• 230000002787 reinforcement Effects 0.000 description 2
• 238000010276 construction Methods 0.000 description 1

Cited By (1)