JPH0521366Y2 - - Google Patents

Info

Publication number

JPH0521366Y2

JPH0521366Y2 JP750088U JP750088U JPH0521366Y2 JP H0521366 Y2 JPH0521366 Y2 JP H0521366Y2 JP 750088 U JP750088 U JP 750088U JP 750088 U JP750088 U JP 750088U JP H0521366 Y2 JPH0521366 Y2 JP H0521366Y2

Authority

JP

Japan

Prior art keywords

concrete

ring

score line

paper

mold

Prior art date

1988-01-22

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 - Lifetime

Links

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