头层牛皮
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The first layer of cowhide
毛孔清晰,纹路不规则
Pores clear, irregular lines
均匀精密,光亮平滑
Uniform and precise
实木框架
Solid wood frame
材质坚硬,纹理清晰
Hard material with clear texture
耐磨损,不易变形
Wear resistant and resistant to deformation