{TAIL ~ a base} mounted on a bottom of {HEAD ~ said housing} and provided with a plurality of tubular portions thereon 
{ TAIL ~ a base } mounted on a bottom of { HEAD ~ said housing } and provided with a plurality of tubular portions thereon
TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH