- High end Solar water heater General glass vacuum tube
- 2016-12-29 19:08
- General solar collector tube 1)higher absorptance ,lower emittance2)reliable quality,reasonalbe price3)warranty 15 year
- Solar copper heat pipe, Purple golden vacuum tube
- 2016-12-29 19:06
- Purple golden vacuum tube is: 1)higher absorptance and lower emittence2)good resistance to cold or hot environment