海空两用灯标 marine and air navigation light

吸吊两用灯 suction and hanging dual-purpose lights

反射透射两用幻灯机 epidiascope

两用照明灯 Nimbus Reading Lamp

透反射两用幻灯机 epidiascope

两用幻灯机 epidiascope ; episcope

立式冷光两用手术灯 vertical double-purpose cold light operating lamp

海空两用导航灯标 marine and air navigation light