... Fin Sticking 2.Fin Coating 3.Fin Cutting 4.Ultra-wave Welding 5.Copper Tube Drilling 6. ... and sale of solar water heaters 2011/01/28 --- 2014/03/01 CE Certificate BST BT0810302002 Solar Working Station, ... BT0810302003 Solar Water Tank-crystal Plastic Series, HSWT-01 2008/10/31 --- 2049/12/31 CE Certificate ... Beijing) Solar Collector, HSC-QT-8 2008/07/01 Product Test Report TUV Solar Collector, HSC-02 ...