heat pipe vacuum tube
it is our heat pipe for the solar collector it is specially for the split solar heaer ,and no water in the tube
it is our split solar heater pipe ,it gets many patents.
It is no water in the tube
heat pipe vacuum tube
it is our heat pipe for the solar collector it is specially for the split solar heaer ,and no water in the tube
it is our split solar heater pipe ,it gets many patents.
It is no water in the tube
heat pipe vacuum tube