韧性要求 meaning in English

toughness reguirements

Cryogenic vessels . materials . part 1 : toughness requirements for temperatures below minus 80 degrees celsius
低温容器.第1部分:温度低于- 80时的韧性要求
Cryogenic vessels - materials - part 2 : toughness requirements for temperatures between - 80 oc and - 20 oc
低温容器.材料.第2部分:在- 80至- 20温度范围内的韧性要求
Standard specification for carbon steel and low - alloy steel pressure - vessel - component forgings with mandatory toughness requirements
具有强制性韧性要求的碳素钢及低合金钢压力容器部件锻件的标准规范