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Solar collector system
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2000-03-11
Improved structure for the vacuum tube type solar energy water heater
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2000-03-11
Improved structure for the solar energy water heater
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2000-06-11
Mono-unit solar energy water heater
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2002-07-21
Solar energy water heater
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2003-12-31
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Improved structure for the solar heat collector of vacuum tube type
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2001-04-11
Improved structure for solar water heater with serial warm-cold derivation vacuum tube
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2002-04-11
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2000-10-05
Solar water heater collector
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2001-11-21
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Improved water tank structure for solar water heater
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2001-11-01
Improved structure for solar energy water heater
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2000-04-04
Solar water heater.
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2000-07-11
Improvement of solar energy water heater
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1999-06-01
Improved structure for water storage can for vacuum pipe of solar energy water heater
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2001-10-01
Improved water tank structure for solar water heater
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2001-12-03
Solar energy collector
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Solar water heater
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1999-01-27
Improved collector for solar energy
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Solar energy collector