JPH0326075Y2 - - Google Patents

Info

Publication number

JPH0326075Y2

JPH0326075Y2 JP8532287U JP8532287U JPH0326075Y2 JP H0326075 Y2 JPH0326075 Y2 JP H0326075Y2 JP 8532287 U JP8532287 U JP 8532287U JP 8532287 U JP8532287 U JP 8532287U JP H0326075 Y2 JPH0326075 Y2 JP H0326075Y2

Authority

JP

Japan

Prior art keywords

pipe

side wall

connecting pipe

closing plate

cap

Prior art date

1987-05-29

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

• 239000004576 sand Substances 0.000 claims description 13
• 230000002265 prevention Effects 0.000 claims 2
• 230000000694 effects Effects 0.000 description 2
• 238000005299 abrasion Methods 0.000 description 1
• 230000000903 blocking effect Effects 0.000 description 1
• 238000004140 cleaning Methods 0.000 description 1
• 230000007547 defect Effects 0.000 description 1
• 230000037431 insertion Effects 0.000 description 1
• 238000003780 insertion Methods 0.000 description 1
• 239000007787 solid Substances 0.000 description 1