タイトルまたは説明

evacuated collector tube with heat pipe features as follows: 1)all glass hard borosilicate:3.3 2)high efficient selective absorption coating :tri-element SS-C/CU and AL-N/AL 3)heat pipe: oxgyen free copper 4)alluminum fin around the copper heat pipe 5)no water in glass tube. the heat is conducted by medium in heat pipe 6)hail resistance:*5mm 8)withstanding in extreme cold weather. 9)normal size:?****0mm and ?****0mm *0)slicone seals and so on certificates: ISO***1 , CCC and CE and keymark SRCC and so on