Diangong Solar vacuum tube heat collector.
电工太阳能真空管集热器。
Currently the most frequently used solar energy collection devices are mainly flat-plate collector and vacuum tube collector.
目前使用最多的太阳能收集装置主要有平板型集热器，真空管集热器两种。
Vacuum tube solar water heater is composed of heat collector, water tank and related accessories, convert solar energy into heat energy relying mainly on tube.
真空管式家用太阳能热水器是由集热管、储水箱及相关附件组成，把太阳能转换成热能主要依靠集热管。
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