solar vacuum tube

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The materials of vacuum-pipe accord with the manufacture of QB/T2436-99(idt) ISO4803-1978 standard 3.3 high-boron through and the lsshing function of resisting cold are very good. Also the stable property of light is strong. Quality gurantee: On the basis of the state standard GB/T17409-2005, all staff organizes carefully, manages strictly, and tries one¡¯s best to communicate with each other to make checks at all qualities levels.

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