said means forming an opening for discharging {TAIL ~ liquid} from said chamber comprises a transverse bottom plate and a plurality of openings formed in said bottom plate disposed substantially around the periphery of {HEAD ~ said bottom plate} 
said means forming an opening for discharging { TAIL ~ liquid } from said chamber comprises a transverse bottom plate and a plurality of openings formed in said bottom plate disposed substantially around the periphery of { HEAD ~ said bottom plate }
OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL 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 HEAD HEAD