冲击硬度试验机
impact hardness testing machine
impact hardness tester
低温冲击韧度
impact toughness at low temperature
Low temperature impact toughness
impact toughness in alow temperature
reverted austenite
焊缝冲击韧度
impact toughness of weld metal
结合剂的强度和硬度
strength and hardness of bond