短語(yǔ)詞組短語(yǔ)beam divergence angle 束立散角;束發(fā)散角;遠(yuǎn)場(chǎng)發(fā)散角;[電子]電子束發(fā)散角Beam radiation angle 散角beam incident angle 波束入射角laser beam inclination angle 切割傾角equivalent beam spread angle 等傚光束發(fā)散角beam divergent angle 發(fā)散角effective beam divergent angle 有傚束散角beam plate angle 板梁角材beam vessel angle 聲束 返回 beam angle