JPH0213825Y2 - - Google Patents

Info

Publication number

JPH0213825Y2

JPH0213825Y2 JP1981196383U JP19638381U JPH0213825Y2 JP H0213825 Y2 JPH0213825 Y2 JP H0213825Y2 JP 1981196383 U JP1981196383 U JP 1981196383U JP 19638381 U JP19638381 U JP 19638381U JP H0213825 Y2 JPH0213825 Y2 JP H0213825Y2

Authority

JP

Japan

Prior art keywords

diaphragm

convolution

negative pressure

valve device

convex portion

Prior art date

1981-12-24

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
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