vacuum tube for solar water heater
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Baoguang high-efficiency vacuum tube,ideal for cold and low solar radiation area use. Excellent absorber coating CU/SS-ALN ensur
Baoguang high-efficiency vacuum tube,ideal for cold and low solar radiation area use. Excellent absorber coating CU/SS-ALN by long time plating,and extremely high temperature for air-exhausting ensure our solar vacuum tubes more durable and reliable.