JPH0222459Y2 - - Google Patents

Info

Publication number

JPH0222459Y2

JPH0222459Y2 JP4172885U JP4172885U JPH0222459Y2 JP H0222459 Y2 JPH0222459 Y2 JP H0222459Y2 JP 4172885 U JP4172885 U JP 4172885U JP 4172885 U JP4172885 U JP 4172885U JP H0222459 Y2 JPH0222459 Y2 JP H0222459Y2

Authority

JP

Japan

Prior art keywords

board

field

roof

snow

melting

Prior art date

1985-03-22

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

• 238000009423 ventilation Methods 0.000 claims description 13
• 238000002844 melting Methods 0.000 claims description 12
• 230000008018 melting Effects 0.000 claims description 7
• 238000010438 heat treatment Methods 0.000 description 2
• 239000000463 material Substances 0.000 description 2
• 239000002184 metal Substances 0.000 description 2
• 238000005516 engineering process Methods 0.000 description 1
• 239000011810 insulating material Substances 0.000 description 1
• 238000009413 insulation Methods 0.000 description 1
• 239000011148 porous material Substances 0.000 description 1
• 239000000126 substance Substances 0.000 description 1
• XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1

Cited By (1)