There are two types of collector, the glazed flat-plate collectors which are very efficient in full sun conditions and the vacuum tube collectors which are very sensitive and can pick up solar heat on even clougy days.
There are two types of collector, the glazed flat-plate collectors which are very efficient in full sun conditions and the vacuum tube collectors which are very sensitive and can pick up solar heat on even clougy days.
这里有两种装置，一种是在阳光充足条件下非常有效的玻璃板装置，一种是非常灵敏的即使在多云天气仍可以采集太阳能的真空管装置。