{TAIL ~ The base} 10 is further provided with a protective cover 70 corresponding in location to the tool set 60 and capable of moving up and down by {HEAD ~ means} of a pull rod 71 for covering the tool set 60 
{ TAIL ~ The base } 10 is further provided with a protective cover 70 corresponding in location to the tool set 60 and capable of moving up and down by { HEAD ~ means } of a pull rod 71 for covering the tool set 60
TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH