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www.toboc.com
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Non-pressure solar water heater
Material and Major Element:
1. Inner water tank: SUS304-2B stainless steel /0.5mm thick
2. Outer water tank: white plate /0.4mm thick
3. Bracket: SUS430 stainless steel /1.2mm and 1.5mm thick
4.Solar vacuum tube:
a) Si ...
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