. . . . "the resistance of a material to permanent deformation under an applied force." . . . "Hardness" . "hardness of material" . . . . . "Christos Vasileiou" . "2026-01-28T10:01:40.292Z"^^ . . . . . . . . . . . "RSA" . "MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAz1OobdRASd9SftHrLhG905OXjv8DHndvyWzXRJ5EDFPankMSnHZPHK+g2qEeRWdonstt55CLrpTpWsVv9xRtTqPidXHbnWLBXX42iCB+EnZNoKqAVKF5GxkSR38S0uTTq3aeQJbw2kTpx6LMkspmuH95fgAI/lfqPWrxdlI98jIeHQ14UXZpiWmkkvPgC9GVgmwHiG1hB/NCA2fKCOxVodN44OfhAPtkWmPJ40IcGPSalI4HRqgLLI5PabdRk3PiG81cUngmQU1Xk6EapzkRJGenkOlGsC5L4ktEPO6LS9uBMLTMLQDtGtkrcwqg5HmeKv7Ili3vgr3LL8/GaBBOLQIDAQAB" . "TpGTyUF+zdsjVkLmVh5P3lvrFvXg3vp3uZbOg7a0mJ8oDDLsT1uy0saoPr5GHzF7j7Pxdu5HeOLcmkI+F6owwZbJSKRk0b1KGX4vSv4+we3FtSQcCfRjQMaj8Nyj/XewYJolhM7yMjShmndNRRv3oJCwKytrWO/ENHBIQBmOw+t+h7fE4o+BOvR0lPNi5s67BHLR7hYAT2EwnqzF1l3WVTXwfBRonpIvyT5MhH7viVvuLtzO8v3w+rc32enPWGL0LR4+pV5KHp+nS6PJO5kEeTutXKBEvuLUG5obYp81vZLF1WBwza5q2i05FBAgMeW6dQW+wLNiM/jEj8nb2ah+GA==" . . .