Solar Garden Light, Outdoor Products, Fireplace manufacturer / supplier in China, offering Precision Sand Casting Part (NLK-C-24), Machining Part (NLK-P-3), Aluminum CNC Machining Part and so on.
It is the last photo.
You have seen all photos.
A spectrograph is an instrument that separates an incoming wave into a frequency spectrum. There are several kinds of machines referred to as spectrographs, depending on the precise nature of the waves.