JPH0539251Y2 - - Google Patents

Info

Publication number

JPH0539251Y2

JPH0539251Y2 JP6033188U JP6033188U JPH0539251Y2 JP H0539251 Y2 JPH0539251 Y2 JP H0539251Y2 JP 6033188 U JP6033188 U JP 6033188U JP 6033188 U JP6033188 U JP 6033188U JP H0539251 Y2 JPH0539251 Y2 JP H0539251Y2

Authority

JP

Japan

Prior art keywords

synthetic resin

resin pipe

core

outer diameter

pipe

Prior art date

1988-05-07

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 - Lifetime

Links

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• 229920003002 synthetic resin Polymers 0.000 claims description 37
• 239000000057 synthetic resin Substances 0.000 claims description 37
• 230000002265 prevention Effects 0.000 claims description 5
• 238000012856 packing Methods 0.000 claims description 4
• 230000008878 coupling Effects 0.000 claims description 2
• 238000010168 coupling process Methods 0.000 claims description 2
• 238000005859 coupling reaction Methods 0.000 claims description 2
• 230000002093 peripheral effect Effects 0.000 claims 2
• 239000004698 Polyethylene Substances 0.000 description 5
• -1 polyethylene Polymers 0.000 description 5
• 229920000573 polyethylene Polymers 0.000 description 5
• 230000000694 effects Effects 0.000 description 3
• 238000000034 method Methods 0.000 description 3
• 229910000838 Al alloy Inorganic materials 0.000 description 2
• 230000008602 contraction Effects 0.000 description 2
• 239000000463 material Substances 0.000 description 2
• 230000005856 abnormality Effects 0.000 description 1
• 238000010276 construction Methods 0.000 description 1
• 238000003780 insertion Methods 0.000 description 1
• 230000037431 insertion Effects 0.000 description 1
• 230000002262 irrigation Effects 0.000 description 1
• 238000003973 irrigation Methods 0.000 description 1
• 230000002787 reinforcement Effects 0.000 description 1