切口韧性 meaning in English

notch toughness

Standard specification for carbon steel forgings for piping components with inherent notch toughness
具有固定切口韧性的管道部件用碳素钢锻件标准规范
Standard specification for wrought - carbon steel butt - welding piping fittings with improved notch toughness
具有改进的切口韧性的对缝焊锻制碳素钢管配件标准规范
Standard specification for carbon and low - alloy steel forgings , requiring notch toughness testing for piping components
管道部件用要求切口韧性试验的碳素钢与低合金钢锻件的标准规范