Angle 1 : Gros plan sur l'Évacuation (De face) « Close-up front view of a hydroponic NFT drainage system. Five parallel white PVC pipes, 100mm diameter, spaced 40cm apart. Each pipe is mounted on a 1-meter high metal frame. At the end of each pipe, a 40mm adjustable pivoting PVC elbow valve is clearly visible. Water is splashing out of the elbows down into a large nutrient tank on the floor. Industrial technical drawing style, white background. » Mehr sehen