APK21N-40CF-100，APK21N-40CF-125，
APK21N-40SL-50，APK21N-40SL-63，
APK21N-40SL-100，无锡昌林，APK21N-40SL-125，
APK21N-40SF-50，APK21N-40SF-63，
APK21N-40SF-100，APK21N-40SF-125，
APK21N-50BL-50，APK21N-50BL-63，二位二通活塞式多介质角座阀
APK21N-50BL-100，APK21N-50BL-125，
APK21N-50BF-50，无锡昌林，APK21N-50BF-63，
APK21N-50BF-100，APK21N-50BF-125，
APK21N-50CL-50，APK21N-50CL-63，
APK21N-50CL-100，APK21N-50CL-125，无锡昌林，
APK21N-50CF-50，APK21N-50CF-63，
APK21N-50CF-100，APK21N-