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Structure improvement of fuel gas valve switch for hot-water heating system
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Improved micro-electromagnetic valve for gas water heater
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Improved open/close apparatus for valve stopper of fuel gas water heater
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Improved structure of gas control conduit of safety valve
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Control apparatus for fuel gas of water heater
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Improved structure of switch for gas valve of gas water heater
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Heating structure for infixed fuel gas water heater
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Improved structure of fire lighter for hot-water heating system
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