?半值角

... half-tone plate 半色调板 half-value angle 半值角 half-value layer 半值层 ...

?半色调板

... 半包调网点再现 half-tone image 半色调板 half-value angle 半值角 half-value layer ...

?半亮度角

... half-uncials ==> 仿安色尔字体 half-value angle ==> 半亮度角,半值角 half-value layer ==> 半价层,半衰减层,半吸收层,半值层 ...