Campbell-stokes sunshine recorder

... camflex valve,偏心旋转阀 Campbell-stokes sunshine recorder,聚集日照计；歇贝斯托克日照计 canonical state variable,规范化状态变量 ...

 stokes sunshine recorder

camflex valve,偏心旋转阀 Campbell-stokes sunshine recorder,聚集日照计；歇贝斯托克日照计 canonical state variable,规范化状态变量 ..