{HEAD ~ The second advancing seat} is further provided with two sensors, whereas the slide block of the second advancing seat is provided with two sensing blocks capable of cooperating with {TAIL ~ the sensors} to execute the shredding operation is conjunction with the tool set and the computer control device 
{ HEAD ~ The second advancing seat } is further provided with two sensors , whereas the slide block of the second advancing seat is provided with two sensing blocks capable of cooperating with { TAIL ~ the sensors } to execute the shredding operation is conjunction with the tool set and the computer control device
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD 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 TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH