JPH0242990Y2 - - Google Patents

Info

Publication number

JPH0242990Y2

JPH0242990Y2 JP14248585U JP14248585U JPH0242990Y2 JP H0242990 Y2 JPH0242990 Y2 JP H0242990Y2 JP 14248585 U JP14248585 U JP 14248585U JP 14248585 U JP14248585 U JP 14248585U JP H0242990 Y2 JPH0242990 Y2 JP H0242990Y2

Authority

JP

Japan

Prior art keywords

duct

folded

wall body

male

female

Prior art date

1985-09-17

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

• 238000012856 packing Methods 0.000 claims description 6
• 238000005452 bending Methods 0.000 description 8
• 229910000831 Steel Inorganic materials 0.000 description 7
• 238000009434 installation Methods 0.000 description 7
• 239000010959 steel Substances 0.000 description 7
• 238000003466 welding Methods 0.000 description 6
• 238000003780 insertion Methods 0.000 description 4
• 230000037431 insertion Effects 0.000 description 4
• 239000000428 dust Substances 0.000 description 3
• 238000000034 method Methods 0.000 description 3
• 238000004378 air conditioning Methods 0.000 description 2
• 238000010586 diagram Methods 0.000 description 2
• 230000000694 effects Effects 0.000 description 2
• 238000004519 manufacturing process Methods 0.000 description 2
• 238000003860 storage Methods 0.000 description 2
• 238000009423 ventilation Methods 0.000 description 2
• 238000005516 engineering process Methods 0.000 description 1
• 238000007373 indentation Methods 0.000 description 1
• 238000011900 installation process Methods 0.000 description 1
• 239000000463 material Substances 0.000 description 1
• 230000009467 reduction Effects 0.000 description 1
• 230000002787 reinforcement Effects 0.000 description 1