Description  Claims  Drawing  Cited references 

JP5156407A   [0005] 
JP2000073142A   [0005] 
JP2005325407A   [0005] 
JP2014145100A   [0005] 
US20090107587A1   [0006] 

JIS-G-4404 (2006) Alloy Tool Steel Material   [0007]