A.數(shù)值為15μm B.數(shù)值為50μm C.數(shù)值為A1 D.數(shù)值為
A.經(jīng)退火處理的為15 B.經(jīng)退火處理的為A C.經(jīng)退火處理的為50 D.經(jīng)退火處理的為1