不是用QStringRef，太容易出错。

Signed-off-by: facat@lab.com <facat@lab.com>

testHasttable/synchronousmachine.cpp

@@ -1,6 +1,6 @@
 #include "synchronousmachine.h"
 
-SynchronousMachine::SynchronousMachine()
+SynchronousMachine::SynchronousMachine(QObject *parent):BasicElementInfo(parent)
 {
 }
 
@@ -10,7 +10,7 @@ bool SynchronousMachine::derivedParse(QXmlStreamReader &reader)
     {
         QString terminal;
         terminal=reader.attributes().value("rdf:resource").toString();
-        this->terminal=terminal.replace("#","").leftRef(-1);//返回整个字符串的Ref
+        this->terminal=terminal.replace("#","").leftRef(-1).toString();//返回整个字符串的Ref
         qDebug()<<"got "<<"ConductingEquipment.Terminals "<<this->terminal<<"\n";
     }
     return true;