(57) Abstract Objective To be able replace the filter easily, the maIt is, for clean water such as the fish preserve which does not have leakage when plugging up of the filterMake the passing device. Constitution To form filter itself 6 with tube-like object 8, the top apertureThe removal possible lid 9 which stops 8a water tight possessing,The pollution water which the inside of that drew with pump 3 and fried storingIn ru taking in water chamber 13 and the percolation chamber 14 block into the top and bottom. Taking in waterChamber in inner skin of boundary part of 13 and percolation chamber 14 tube-like object 8Directing to inner split, the support shelf 12 which you project to be formed, the filter17 is supported. As for filter 17, sabot 18 and circulation hole 1Cupola 19 of the top which possesses 9b and that cupola 19 and the sabotThe shape retention cylinder material 20 which is put to 18 and the whole is locked in the top and bottomShift business bar 21 because of the ru and shift component 22 and shape retention cylinder material 2 To have with the network 23 for percolation which is stuck for the inside of 0, plugging upWhen causing, removing from support shelf 12, to the upper part pulling outTaking, resolution.
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