beam shutter光束: light beam a surname光束: light beam; light pencil; luminous flux; pencil; stricture暗光束: dark beam单光束: single beam导光束: endoscopic light guide bundles; light transmitting bundle下载手机词典可随时随地查词查翻译关注微信公众号：chachacidian，回复:光束闸，即可在微信中查询翻译
