The nature of the electrode state is produced in certain crystals by temperature changes. When certain dielectric (non-conductive) crystals are subjected to a uniform temperature change ΔT, they exhibit an electrode polarization ΔP. A material having a thermoelectric effect is called a thermoelectric material. Typical examples of the pyroelectric crystal of tourmaline, lithium sulfate monohydrate compound, sucrose and ferroelectric barium titanate. Milling is the process of machining using rotary cutters to remove material by advancing a cutter into a workpiece. This may be done varying direction on one or several axes, cutter head speed, and pressure. Milling covers a wide variety of different operations and machines, on scales from small individual parts to large, heavy-duty gang milling operations. It is one of the most commonly used processes for machining custom parts to precise tolerances. Steel Cnc Milling,Steel Cnc Milling Components,Steel Cnc Milling Parts,Steel Cnc Precision Milling Chongqing Jin Te Rui Machine Co.,Ltd , https://www.cncjtr.com