Preferably, a groove is configured in {TAIL ~ a top surface} of {HEAD ~ the cooling tube} 554 adjacent the porous insert 552 for retaining an end seal 104 as previously described 
Preferably , a groove is configured in { TAIL ~ a top surface } of { HEAD ~ the cooling tube } 554 adjacent the porous insert 552 for retaining an end seal 104 as previously described
OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH