(IP 
  (ADVP 
    (AD 但))
                    
  (IP-CND 
    (NP-SBJ 
      (-NONE- *pro*))
                    
    (VP 
      (VV 想要)
                    
      (IP-OBJ 
        (NP-SBJ 
          (-NONE- *PRO*))
                    
        (VP 
          (ADVP 
            (AD 长久))
                    
          (VP 
            (VV 保存)
                    
            (NP-OBJ 
              (NP 
                (DNP 
                  (NP 
                    (NT 过去))
                    
                  (DEG 的))
                    
                (ADJP 
                  (JJ 老))
                    
                (ADJP 
                  (JJ 旧))
                    
                (NP 
                  (NN 火车)))
                    
              (NP 
                (NN 机械))))))))
                    
  (PU ，)
                    
  (NP-SBJ 
    (NN 技术))
                    
  (VP 
    (VP 
      (ADVP 
        (AD 非))
                    
      (VP 
        (VV 得)
                    
        (VP 
          (VV 薪传))))
                    
    (VP 
      (ADVP 
        (AD 不))
                    
      (VP 
        (VV 可)))))
arg1: 
                    技术 
                
argm: 
                    非 
                
argm: 
                    *pro* 想要 *PRO* 长久 保存 过去 的 老 旧 火车 机械 
                
argm: 
                    但