| CPC E05B 1/0015 (2013.01) | 19 Claims |

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1. A handle structure, comprising:
a first handle body having a first handle portion, a first connecting portion, and a first shoulder disposed along an inner wall of the first handle portion, wherein the first shoulder defines a transition between the first handle portion and an inner wall of the first connecting portion;
a second handle body having a second handle portion, a second connecting portion, and a second shoulder disposed along an inner wall of the second handle portion, wherein the second shoulder defines a transition between the second handle portion and an inner wall of the second connecting portion;
a transparent plate; and
a first gasket;
wherein the first handle body and the second handle body are hollow;
wherein the first connecting portion is detachably connected with the second connecting portion when the first handle body and the second handle body are in an installed position; and
wherein the transparent plate and the first gasket are disposed between the first shoulder and the second shoulder, the transparent plate abutting against one of the first shoulder or the second shoulder through the first gasket such that the transparent plate is sealingly connected with the first connecting portion and the second connecting portion when the first handle body and the second handle body are in the installed position.
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