在照相机制造史上 ,一些著名的照相机生产厂家往往在其生产的某些相机机型上镀以贵重金属金（Ａｕ）和铂（Ｐｔ）。前者俗称镀“黄金” ,后者俗称镀“白金”。这些镀金机型往往在下列情形下被制造 :一是纪念与摄影有关的著名人物和历史事件 ;二是纪念本企业具有某种“里程碑” In the history of camera manufacture, some well-known camera manufacturers often apply precious metal gold (Au) and platinum (Pt) on certain camera models they produce. The former commonly known as plating “gold”, which commonly known as plated “platinum.” These gold-plated models are often manufactured in the following circumstances: First, to commemorate the photography and the famous figures and historical events; second is to commemorate the business has some “milestone”