{HEAD ~ The removable substrate holder} may be loaded/unloaded away from {TAIL ~ the substrate boat} with susceptors 
{ HEAD ~ The removable substrate holder } may be loaded / unloaded away from { TAIL ~ the substrate boat } with susceptors
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH