JPH0351399Y2 - - Google Patents

Info

Publication number

JPH0351399Y2

JPH0351399Y2 JP1984176661U JP17666184U JPH0351399Y2 JP H0351399 Y2 JPH0351399 Y2 JP H0351399Y2 JP 1984176661 U JP1984176661 U JP 1984176661U JP 17666184 U JP17666184 U JP 17666184U JP H0351399 Y2 JPH0351399 Y2 JP H0351399Y2

Authority

JP

Japan

Prior art keywords

arm

rack

telescoping arm

arms

excavation

Prior art date

1984-11-22

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

• 238000009412 basement excavation Methods 0.000 claims description 17
• 239000010426 asphalt Substances 0.000 description 3
• 230000008602 contraction Effects 0.000 description 3
• 239000002344 surface layer Substances 0.000 description 3
• 239000010410 layer Substances 0.000 description 2
• 238000003466 welding Methods 0.000 description 2
• 239000003638 chemical reducing agent Substances 0.000 description 1
• 238000010586 diagram Methods 0.000 description 1
• 238000005553 drilling Methods 0.000 description 1
• 230000000694 effects Effects 0.000 description 1
• 238000003754 machining Methods 0.000 description 1
• 230000002265 prevention Effects 0.000 description 1