{TAIL ~ The compressed substrate boat} comprises a stationary substrate boat and {HEAD ~ a movable substrate boat}, each may be loaded/unloaded independently 
{ TAIL ~ The compressed substrate boat } comprises a stationary substrate boat and { HEAD ~ a movable substrate boat } , each may be loaded / unloaded independently
TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH