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 {TAIL ~ a pull rod} 71 for covering the tool set 60 
of
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 { TAIL ~ a pull rod } 71 for covering the tool set 60
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 OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH