JPH0231871Y2 - - Google Patents

Info

Publication number

JPH0231871Y2

JPH0231871Y2 JP1983187924U JP18792483U JPH0231871Y2 JP H0231871 Y2 JPH0231871 Y2 JP H0231871Y2 JP 1983187924 U JP1983187924 U JP 1983187924U JP 18792483 U JP18792483 U JP 18792483U JP H0231871 Y2 JPH0231871 Y2 JP H0231871Y2

Authority

JP

Japan

Prior art keywords

lid

frame

pit

fitting

opening

Prior art date

1983-12-05

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
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• 230000037431 insertion Effects 0.000 claims description 11
• 238000003780 insertion Methods 0.000 claims description 11
• 238000009408 flooring Methods 0.000 description 8
• 239000000463 material Substances 0.000 description 8
• XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 5
• 229910052742 iron Inorganic materials 0.000 description 3
• 238000009933 burial Methods 0.000 description 1
• 238000010276 construction Methods 0.000 description 1
• 150000002505 iron Chemical class 0.000 description 1
• 239000002184 metal Substances 0.000 description 1
• 229910052751 metal Inorganic materials 0.000 description 1