core material and filter material joint anti-perme
material evaluation of gas standard material
material quota material
amphiprotic temper brittleness
boron brittleness phenomenon
Brittleness
脆性
脆化
脆
脆度
脆弱
脆值
氢
氢脆
室温脆性
中温脆性
脆性度
金属脆性
楔劈
尖劈
脆弱性
变脆
硼
brittleness and ductility
Brittleness at Elevated Temperature
brittleness coefficient
brittleness fracture of steel wire
brittleness fracture resistance