JPS648640U - - Google Patents

Info

Publication number
JPS648640U
JPS648640U JP10347487U JP10347487U JPS648640U JP S648640 U JPS648640 U JP S648640U JP 10347487 U JP10347487 U JP 10347487U JP 10347487 U JP10347487 U JP 10347487U JP S648640 U JPS648640 U JP S648640U
Authority
JP
Japan
Prior art keywords
knock
detecting
determining
detection means
density
Prior art date
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
Application number
JP10347487U
Other languages
English (en)
Japanese (ja)
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed filed Critical
Priority to JP10347487U priority Critical patent/JPS648640U/ja
Publication of JPS648640U publication Critical patent/JPS648640U/ja
Pending legal-status Critical Current

Links

Landscapes

  • Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
JP10347487U 1987-07-07 1987-07-07 Pending JPS648640U (enrdf_load_stackoverflow)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10347487U JPS648640U (enrdf_load_stackoverflow) 1987-07-07 1987-07-07

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10347487U JPS648640U (enrdf_load_stackoverflow) 1987-07-07 1987-07-07

Publications (1)

Publication Number Publication Date
JPS648640U true JPS648640U (enrdf_load_stackoverflow) 1989-01-18

Family

ID=31334340

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10347487U Pending JPS648640U (enrdf_load_stackoverflow) 1987-07-07 1987-07-07

Country Status (1)

Country Link
JP (1) JPS648640U (enrdf_load_stackoverflow)

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