Cathode fluid controlling assembly for use in a direct oxidation fuel cell system
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Use of an irrigation valve device for potted plants
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Film tunnel or film greenhouse
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DEVICE FOR HEATING PLANT CULTURES
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Irrigation drip hose regulation equipment - has components turned in each other and eccentric hose bore
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Irrigation valve device
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Inflating component of irrigation valve - provides feed depending on humidity extent, subject to water passage through valve
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Continuously operating, throughput-controlled, irrigation system - comprises perforated pipeline, each perforation being adjustably closable by swellable gel plug, pref. of polyurethane
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Inflating component of irrigation valve - provides feed depending on humidity extent, subject to water passage through valve
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Weather dependent plant watering device - uses expansion of pine block due to humidity to control water supply line
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Greenhouse automatic window opening mechanism - has spring loaded crank arm connecting temp. operated cylinder and adjustable pressure arm
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Plastics foil sheeting frame tent or green house - has one-piece foil section with arcuate cuts for snug fit round gables without excessive gathering
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Plastics foil sheeting green house or frame tent - has larger door than door frame providing seal on outside
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Ventilation window for green house - has frame fixed to elements of support frame and flexible skin
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Hot bed case with box frame - has hinged window frame with arched strap to tension plastics sheet outwards
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Assembled lined circular swimming pool - has upright laths interconnected by wires drawn through transverse holes
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Driving mirror with anti-dazzle setting - has highly reflecting surface on reverse of absorbing surface with rotational control
