Source google image: https://sc02.alicdn.com/kf/HTB19icQJpXXXXasXFXXq6xXFXXXC/Heat-pipe-solar-vacuum-tube-for-solar.jpg_350x350.jpg
Tuyau pour panneau solaire
Source google image: https://sc02.alicdn.com/kf/HTB19icQJpXXXXasXFXXq6xXFXXXC/Heat-pipe-solar-vacuum-tube-for-solar.jpg_350x350.jpg