
Knoop hardness test - Verification of testing machines
出版:Japanese Standards Association

專(zhuān)家解讀視頻
This Standard specifies the direct verification method and the indirect verification method of the testing machine to be used for the Knoop hardness test in accordance with JIS Z 2251. The indirect verification method can be used in the daily accuracy control of the testing machine.
ISO 4546:1993 - Equivalent