a plurality of anchor plates arranged in a longitudinal direction, {HEAD ~ each} of said anchor plates being secured to {TAIL ~ the bottom} of a tank; and 
a plurality of anchor plates arranged in a longitudinal direction , { HEAD ~ each } of said anchor plates being secured to { TAIL ~ the bottom } of a tank ; and
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH