JPS63115681U - - Google Patents

Info

Publication number

JPS63115681U

JPS63115681U JP708887U JP708887U JPS63115681U JP S63115681 U JPS63115681 U JP S63115681U JP 708887 U JP708887 U JP 708887U JP 708887 U JP708887 U JP 708887U JP S63115681 U JPS63115681 U JP S63115681U

Authority

JP

Japan

Prior art keywords

synthetic resin

reinforcing rib

pipe

pipe wall

box

Prior art date

1987-01-21

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
• Discuss

• 229920003002 synthetic resin Polymers 0.000 claims 4
• 239000000057 synthetic resin Substances 0.000 claims 4
• 230000003014 reinforcing effect Effects 0.000 claims 3
• 238000010586 diagram Methods 0.000 description 1
• 230000002787 reinforcement Effects 0.000 description 1

Cited By (2)