Taking the QT400-18 L low temperature ductile iron gear box used for locomotive as example. through the control of the element content of the material. the graphite spheroidization is more fully. At the same time. https://www.diegojavierfares.com/flash-price-Shure-BLX2-PG58-H10-Handheld-Wireless-Microphone-Transmitter-top-savings/