hardened by

URI: https://gptkb.org/prop/hardened_by
4 triples
GPTKB property
Random triples
Subject Object
gptkb:A16_tool_steel air quenching
gptkb:A25_tool_steel air quenching
gptkb:A-series_tool_steel air quenching
gptkb:A18_tool_steel air quenching