The tooth crown is manufactured by the composite structure antiwear plug welding technology.
所述齿冠采用复合结构耐磨塞焊技术制作。
Just a few spare parts shall be replaced by the user. In addition, the machine shall also seal aluminum security plug, three screw cap and crown cap.
用户只需更换极少零部件，还可实现对铝质防盗盖、三旋盖、皇冠盖的封口。
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