In one embodiment the heat shield acts as a stopper to prevent the vacuum cap from moving upwards and helps the vacuum cap from absorbing multiple mechanical stress in {HEAD ~ order} to protect {TAIL ~ the vacuum cylinder} from being damaged 
In one embodiment the heat shield acts as a stopper to prevent the vacuum cap from moving upwards and helps the vacuum cap from absorbing multiple mechanical stress in { HEAD ~ order } to protect { TAIL ~ the vacuum cylinder } from being damaged
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 OTH OTH HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH