... 250, HT300 Gray Iron: QT400, QT500, QT600,QT700 Test Machine: Spectrometer ; Microscope; ... for gap broaching machine.3). OEM service offered. 4). Producing Casting Equipment: Electric furnace; Shot blasting machine; Annealing furnace; Full ... -automatic resin molding equipment5). Material:Ductile Iron: HT 250, HT300Gray Iron: QT400, QT500, QT600,QT700 For further information, please ...