A pipe connector for making a plurality of first pipes communicate with a plurality of second pipes so that {HEAD ~ a fluid} may flow through the first pipes and {TAIL ~ the second pipes}, comprising: 
A pipe connector for making a plurality of first pipes communicate with a plurality of second pipes so that { HEAD ~ a fluid } may flow through the first pipes and { TAIL ~ the second pipes } , comprising :
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH REL REL OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH