JPH0520809Y2 - - Google Patents

Info

Publication number

JPH0520809Y2

JPH0520809Y2 JP18054987U JP18054987U JPH0520809Y2 JP H0520809 Y2 JPH0520809 Y2 JP H0520809Y2 JP 18054987 U JP18054987 U JP 18054987U JP 18054987 U JP18054987 U JP 18054987U JP H0520809 Y2 JPH0520809 Y2 JP H0520809Y2

Authority

JP

Japan

Prior art keywords

rod

fixed

spherical

shaped body

upper structure

Prior art date

1987-11-27

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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• 238000006073 displacement reaction Methods 0.000 description 7
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• 239000011345 viscous material Substances 0.000 description 6
• 239000000463 material Substances 0.000 description 5
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• 229910000831 Steel Inorganic materials 0.000 description 3
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• 239000010959 steel Substances 0.000 description 3
• 238000010521 absorption reaction Methods 0.000 description 2
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• RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
• 229910000881 Cu alloy Inorganic materials 0.000 description 1
• 229920002367 Polyisobutene Polymers 0.000 description 1
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• 229910045601 alloy Inorganic materials 0.000 description 1
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• 239000010439 graphite Substances 0.000 description 1
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• 239000007788 liquid Substances 0.000 description 1
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• 238000003466 welding Methods 0.000 description 1