求翻译：整体立式圆锥形结构、采用锥形封头、三层结构，带保温， 内表面抛光处理(粗糙度Ra是什么意思？

Overall vertical conical structure, the conical head, three-tier structure, with insulation, the inner surface of the polished (roughness ra, <0.4μm); within the tank welding at the flanging process arc transition smooth and easy to clean no dead ends, aesthetic appearance; round a closed contain

Overall vertical cone shaped structure, with conical seal head, 3-story structure, with a warm, polished surface roughness Ra ( <0.4 µm), the tank welding is a flip side arc transition process smooth and easy-to-clean, and no dead ends, beautifully; round closed container

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Overall vertical cone-shaped structure, with cone-shaped head, a three-tier structure, insulation, surface polishing (roughness Ra<0.4 μ m), tank welding arc transition using the flanging process, smooth, easy to clean, no dead ends, beautiful appearance; the circle closed container

The whole vertical cone structure, uses the cone-shape shell cover, three structures, has the heat preservation, internal surface polishing processing (roughness Ra<0.4μm); In the shell of tank welding place uses the flange craft circular arc transition, smooth easy to clean does not have the dea