Pressure sensor is a kind of sensor that becomes pressure signal change telegraphic name, main component is static state and dynamic pressure sensor two kinds. High frequency give priority to in order to press electric type pressure sensor; Low frequency static state is given priority to with pressing pressure sensor of type of block silicon, meet an emergency. Dynamic pressure sensor basically applies at pressure of experiment of explosive physics, wind tunnel, free field to measure a domain; Static pressure sensor basically applies at the domain such as safe control, manufacturing process control. CNC Milling