[核]?有限正比区

... 正比区proportional region 有限正比区region of limited proportionality 盖革区Geiger region ...

?有限比例区

... 无限延伸区 region of infinite extent 有限比例区 region of limited proportionality 半影区 region of partial shadow ...

?有限成比例区

... proportionality factor 比例因子,比例系数... region of limited proportionality 有限成比例区... law of proportionality 比例定律 ...