The welding seam needs no polishing, and is beautiful.
焊缝不需打磨，美观大方。
The structure of the vacuum cup adopts self-locking connection mode, thereby having no welding seam and overall aesthetic property; moreover, the handle is firmly arranged without sloshing.
这种保温杯的结构采用自锁配连接方式，无焊缝，整体美观，手柄稳定牢固无晃动。
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