联轴器固定螺栓 NANIWA.BHR-32.158 IMPELLER NUT NANIWA.BHR-32.120 叶轮键 .BHR-32.103 SHAFT BHR-32.101 O形圈浪花.BHR-32.050 CASING RING .BHR-32.020 IMPELLER .BHR-32.003 GASKET .BHR-32.950 MECHANICAL SEAL NANIWA.BHR-32.520 耦合螺栓 NANIWA.BHR-32.305