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JPH08280754A
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Lifting sheet for nursing
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JPH0549814A
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Filter device
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JPH04171008A
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Agitating element for filler tank
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JPS5886031A
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Cleaner of sludge and sand layer of pond
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JPS586218A
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Submerged type filter
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JPS57150418A
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Open type stereo filtering device
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JPS57102207A
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Outflow preventing device of filter-sand for back washing in filter tank
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JPS56168811A
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Automatic washing device for filter tank
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JPS56168810A
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Filter device of not using supporting plate for filter bed and filtration method for forming raw water chamber in filter sand bed
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JPS5621612A
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Preventing device for outflow of filter material during back washing in filtration tank
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JPS5665609A
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Filtrate height adjusting device in filter
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JPS5535978A
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Cleaning of multi-unit type dipped filter bed
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JPS5513177A
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Centrifugal dryer of sludge
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JPS54117921A
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Automatic discharger of filter basin
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JPS54101562A
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Setting pond with multistage horizontal plates
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JPS5485474A
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Multilayer settling pond with horizontal plates
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JPS5452857A
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Device of extracting sludge of sedimentation basin
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JPS544456A
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Sludge centrifugal dehydrator
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JPS53120845A
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Rotary spiral contact filter with impeller
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JPS5347893A
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Automatic device for separate pouring
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