There is disclosed a bus interface unit for transferring machine specific register requests between a plurality of bus devices. The frame comprising a pushpull handle, a front wheel frame on which at least one front wheel is rotatably mounted and a rear wheel frame on which at least one rear wheel is rotatably mounted. The copper layer satisfies Dcs\u22660. The invention further provides a processing process comprising the provision of noble metal-containing mixtures and also the heat-resistant chamber loaded with noble metal-containing mixtures itself. An antenna of the antenna unit, a coaxial cable, and a connecting unit cover are fused for coverage, and thereby it becomes possible to improve drip-proofness of the antenna unit by preventing water from entering from the gap between these materials when disinfectant is sprayed by misting, for example. The beam swapping element is designed and positioned such that the first and second beams of light swap positions upon reflection from the reflective surface and trace out the other’s optical path.