通过实验，还分别测定了单根真空管和真空管集热器的瞬时效率曲线。
Instantaneous efficiency curves for both single evacuated tube and complete evacuated tubular collector are also tested.
通过实验，还分别测定了单根真空管和真空管集热器的瞬时效率曲线。
Instantaneous efficiency curves for both single evacuated tube and complete evacuated tubular collector are also tested.
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