Storage expansion for a virtual machine operating system is reduced. The rotary machines have one or more stages and each stage has one or more rotary components. In turn, the system generates a composite image that combines the street view image with a viewing area overlay corresponding to the real-time viewable area. The metal structure is disposed on the electrode layer and located above the gap, and the metal structure has a melting temperature lower than a melting temperature of the electrode layer. In the semi-transparent and semi-reflection device is a belt-like semi-transparent and semi-reflection film and a light source therein. Data is read from the same sector by a number of times and a majority decision is done in the same address, thereby the most frequently read value is regarded as the true data value in the address.