JPH0318901U - - Google Patents

Info

Publication number

JPH0318901U

JPH0318901U JP7749289U JP7749289U JPH0318901U JP H0318901 U JPH0318901 U JP H0318901U JP 7749289 U JP7749289 U JP 7749289U JP 7749289 U JP7749289 U JP 7749289U JP H0318901 U JPH0318901 U JP H0318901U

Authority

JP

Japan

Prior art keywords

plug

conical surface

core

center line

convex conical

Prior art date

1989-06-30

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.)

Pending

Links

• Espacenet
• Global Dossier
• Discuss

• 239000002184 metal Substances 0.000 claims description 6
• 229910000831 Steel Inorganic materials 0.000 claims 1
• 230000000295 complement effect Effects 0.000 claims 1
• 238000005553 drilling Methods 0.000 claims 1
• 239000010959 steel Substances 0.000 claims 1
• 230000008878 coupling Effects 0.000 description 2
• 238000010168 coupling process Methods 0.000 description 2
• 238000005859 coupling reaction Methods 0.000 description 2
• 238000010586 diagram Methods 0.000 description 1

Cited By (1)