| 摘要 |
An insulator sleeve includes: a seamed cylindrical body having top and bottom open ends, the seamed cylindrical body including an annular folded insulator wall of an insulator material, and an annular folded surface layer attached to the folded insulator wall, the folded insulator wall extending from the top open end to the bottom open end of the seamed cylindrical body, and having an outer surface, a folded end, and two free ends that are substantially flush with each other, the folded surface layer covering the outer surface of the folded insulator wall, and having a folded end that cooperates with the folded end of the folded insulator wall to define the top open end of the seamed cylindrical body; and a base secured to the bottom open end of the seamed cylindrical body.
|
