US3707142A
(en)
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Heat-preserving boiler
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US3465123A
(en)
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Means for directing supply water toward the low temperature zone of water heater
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US2814278A
(en)
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Combined water heater and storage tank
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US3802397A
(en)
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Water heater and method of constructing the same
|
US4206723A
(en)
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Double-fired heating boiler
|
US3718544A
(en)
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Water heating and purification system
|
US3612001A
(en)
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Boiler
|
US3236212A
(en)
|
|
Boiler
|
US2652036A
(en)
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Plate type undulating flue boiler
|
US4295447A
(en)
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Heating boiler and temperature control therefor
|
DE1579835C3
(de)
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Thermostatisch geregeltes Sammelheizungsgerät mit einem über einen Thermostaten auf Vorrang schaltbaren Brauchwasserbereiter
|
GB2255161A
(en)
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Heating system
|
DE1751498B1
(de)
|
|
UEberhitzungsschutz- und Sicherheitsvorrichtung
|
GB2248674B
(en)
|
|
Waterheating apparatus
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DD88388A
(enrdf_load_stackoverflow)
|
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