JPS6111311Y2 - - Google Patents

Info

Publication number

JPS6111311Y2

JPS6111311Y2 JP4642881U JP4642881U JPS6111311Y2 JP S6111311 Y2 JPS6111311 Y2 JP S6111311Y2 JP 4642881 U JP4642881 U JP 4642881U JP 4642881 U JP4642881 U JP 4642881U JP S6111311 Y2 JPS6111311 Y2 JP S6111311Y2

Authority

JP

Japan

Prior art keywords

drain pipe

pipes

drainage

circumferential surface

drain

Prior art date

1981-04-02

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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• XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
• 239000002689 soil Substances 0.000 description 5
• 238000005253 cladding Methods 0.000 description 3
• 238000010276 construction Methods 0.000 description 3
• 241000196324 Embryophyta Species 0.000 description 2
• 229910052571 earthenware Inorganic materials 0.000 description 2
• 239000000463 material Substances 0.000 description 2
• 230000002093 peripheral effect Effects 0.000 description 2
• 239000012466 permeate Substances 0.000 description 2
• 240000007594 Oryza sativa Species 0.000 description 1
• 235000007164 Oryza sativa Nutrition 0.000 description 1
• 239000003657 drainage water Substances 0.000 description 1
• 230000008014 freezing Effects 0.000 description 1
• 238000007710 freezing Methods 0.000 description 1
• 239000003673 groundwater Substances 0.000 description 1
• 238000000034 method Methods 0.000 description 1
• 235000009566 rice Nutrition 0.000 description 1
• 239000004576 sand Substances 0.000 description 1
• 125000006850 spacer group Chemical group 0.000 description 1
• 239000010902 straw Substances 0.000 description 1
• 239000002351 wastewater Substances 0.000 description 1