Embodiments presented herein provide apparatus and methods for forming and coupling an attachment device onto one or more teeth. the cooling fan and the driving motor are isolated from the exhaust fan communicating with the exhaust outlet, and communicate with the air inlet by a first partition plate of a guide unit. 5 deniers, wherein the basis weight is in the range of 5 to 40 gm2 and the embossed area ratio is in the range of 6. The input surface and the output surface are formed in such a way that the light emitted from the output surface via the first input surface with the maximum angle from the optical axis L1 has a larger angle from the optical axis L1 than the light emitted from the output surface via the second input surface with the maximum angle from the optical axis L1. In one embodiment, the system for removing includes a system for moving a plurality of sheets of sand paper over the weld land areas. Specifically, a set of memory modules is coupled to an FPGA.