Shandong diaphragm, coupling diaphragm, high-speed diaphragm coupling, JMIJ type intermediate shaft type diaphragm coupling, JZMJ type diaphragm coupling for heavy machinery, JZM type diaphragm coupling for heavy machinery , DJM Expansion Sleeve Diaphragm Coupling, JMⅡJ Intermediate Shaft Diaphragm Coupling, JMI Basic Diaphragm Coupling with Counterbore, JMⅡ Basic Diaphragm Coupling without Counterbore-Hangzhou Hengli Transmission Co., Ltd.