Oral history is a branch of history to collect, keep and spread the oral historical data that take oral historical material as its research object.
口述史学是搜集、保存和传播口述史料，以口述历史为研究对象的一门历史学分支学科。
Take as standard detected object to detect the basic performance. The shape, size and material have been determined.
为测定基本性能作为标准的检测物体，形状、尺寸、材料已决定的。
All product outward appearance, the color take the material object as, the picture only supply the reference.
所有产品外观、颜色以实物为准，图片仅供参考。
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