A magnetically coupled pushbutton switch may be improved by adding protuberances to the top of an armature to create a weak heel on the armature. Then, historical data for values of the exogenous variables and historical data for the observed prices of the asset over a time period are processed to obtain a formula for calculating price estimates for the asset as a function of the exogenous variables. A cooling fan is rotatably secured at one end of the driving shaft to rotate by the driving shaft to cool the fixed scroll. The slope reference attenuation signal selection unit 103 estimates a data signal which may cause a peak after oversampling, based on an amplitude value of a data signal and a slope estimation value, and determines an attenuation amount for a selected data signal. The display processing device is configured to change a display format of the incline guide display in accordance with the magnitude of the incline. When the high pressure, high temperature exhaust gas by engine enters the chamber from the gas-in tube, the exhaust gas is divided and dispersed by the arrow shape bars and forms disturbance condition, the exhaust gas collides to lower the noise level; the arrow shape bars increase the contact time and area with gas that lowers the temperature and pressure effectively.