The oblique slot is formed on the front surface and communicates with {HEAD ~ a chamber} of {TAIL ~ the base} 
of
The oblique slot is formed on the front surface and communicates with { HEAD ~ a chamber } of { TAIL ~ the base }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL