The calculation shows that using the selectivecoating and the cylindrical glass cover both are the effective means to improve the thermal performance of the collector.
计算表明，使用选择性吸收涂层和圆管形玻璃罩都是改善集热器热性能的有效措施。
2
Spectral selective absorbing coating is a kind of special coating with high absorptance in vis-near infrared wavelength and high reflectance in infrared wavelength.
光谱选择性吸收涂层是一种具有对可见-近红外光高吸收、对红外光高反射的特种涂层。
3
Circuit board exactly averting connector, etc no coating area, able to realize selective spraying technics.