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zenith tube：天頂儀

zenith distance 天頂角距 | zenith tube 天頂儀 | zenith 頂點

zenith tube：天頂筒,天頂儀

zenith telescope ==> 天頂儀 | zenith tube ==> 天頂筒,天頂儀 | zenith-angle effect ==> 天頂角效應(yīng)

photographic zenith tube：[天]照相天頂筒

univariable series 單變量級數(shù) | photographic zenith tube [天]照相天頂筒 | relation of distribution 分配關(guān)系

photographic zenith tube：照光天頂管

photographic tansmission density 照相透光密度 | photographic zenith tube 照光天頂管 | photography 照相術(shù),攝影術(shù)

photographic zenith tube：照相天頂筒

photographic triangulation 照相三角測量 | photographic zenith tube 照相天頂筒 | photoheliogram 太陽[全色]照片