JPS6141795Y2 - - Google Patents

Info

Publication number

JPS6141795Y2

JPS6141795Y2 JP6015882U JP6015882U JPS6141795Y2 JP S6141795 Y2 JPS6141795 Y2 JP S6141795Y2 JP 6015882 U JP6015882 U JP 6015882U JP 6015882 U JP6015882 U JP 6015882U JP S6141795 Y2 JPS6141795 Y2 JP S6141795Y2

Authority

JP

Japan

Prior art keywords

arm portion

arm

attached

outer arm

cylindrical frame

Prior art date

1982-04-24

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
• Discuss

• 238000000605 extraction Methods 0.000 claims description 6
• 239000012530 fluid Substances 0.000 claims description 3
• 238000003780 insertion Methods 0.000 description 2
• 230000037431 insertion Effects 0.000 description 2
• 239000002184 metal Substances 0.000 description 2
• 230000004048 modification Effects 0.000 description 2
• 238000012986 modification Methods 0.000 description 2
• 229920003002 synthetic resin Polymers 0.000 description 2
• 239000000057 synthetic resin Substances 0.000 description 2
• 238000009412 basement excavation Methods 0.000 description 1
• 230000000149 penetrating effect Effects 0.000 description 1
• 238000003466 welding Methods 0.000 description 1