This tube is between metal vacuum tube and all-glass vacuum tube. It can be used in cold area and its price is much low than the metal vacuum tube.
This tube is between metal vacuum tube and all-glass vacuum tube. It can be used in cold area and its price is much low than the metal vacuum tube.
介于全玻璃真空管和封装式热管太阳集热器中间的一种太阳集热器,弥补了全玻璃真空管的缺点,借鉴了封装式热管太阳集热器的优点.