YZG7-1内螺纹异径接头YZG7-1 Inside Thread Reducing Union

YZG7-2内螺纹弯通接头YZG7-2 Inside Thread Elbow Pipe Connector

YZG7-3内螺纹三通接头YZG7-3 Inside Thread T-Pipe Connector

YZG7-4内螺纹四通接头YZG7-4 Inside Thread Crossbar Connector