dental film viewing box

专业... ... 牙科X线洗片夹 dental film holder 牙科X光看片灯 dental film viewing-box 点隙裂沟封闭剂 dental fissure sealant ...

viewing是什... ... critical viewing distance 临界明辨距离 dental film viewing-box 牙科X光片看片灯 direct viewing 直接观看 ...