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JPS58163878A
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Sluice valve in penstock having dust preventing equipment
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JPS58667A
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Closing device in gate valve
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JPS58686A
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Valve cooling device in gate valve
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JPS57184767A
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Sealing device for butterfly valve
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JPS57115647A
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Automatic feed hot water device
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JPS57112638A
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Water heater for hot water supplyer
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JPS5710040A
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Heat absorber for hot-water supplying heat accumulating tank
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JPS578674A
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Warehouse body into which heat insulator is entered
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JPS5697463A
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Water discharging apparatus for fire fighting
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JPS5659062A
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Valve seat structure for butterfly-type check valve
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JPS5436628A
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Collecting valve for multiple pipeline
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JPS5348965A
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Device for forming large caliber bellow pipes
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