unaffected base metal的意思|示意

未受热影响的基体金属 ... unalloyed steel非合金钢、普通钢 unaffected base metal未受热影响的基体金属 unassorted未分选（分级）的 ...

未受影响的母材 ... unadjusted trial balance ==> 调整前试算表 unaffected base metal ==> 未受影响的母材 unaffected by temperature fluctuations ==> 不受温度波动影响 ...