"Three rounds and one rope" are three pulleys and one nylon rope. Pulley diameter of 5 cm is appropriate, nylon rope is 0.5 cm thick, 12 meters long is appropriate. During installation, the two pulleys are inside the film and are located directly above the corridor in the shed. The two pulleys are fixed on the steel bars on the back slope of the shed by iron wire. The distance between the two pulleys is not too close (the pulley is too close, Nylon ropes are easily tangled together, affecting ventilation. The distance is about 30 cm. Another pulley was placed outside the film, about 20 cm south of the vent, and the three pulleys were positioned like an isosceles triangle. Then wear the nylon rope between the pulleys, and the two ends of the rope just hang on the back wall of the shed. Be careful to tie the rope at both ends to prevent slipping. "Three-wheel and one-rope" ventilation is very convenient. Now we are still using arbor ventilation outside the greenhouse or single-vessel ventilation in the shed. Try this method.
This is a visual rehabilitation device. It has the function of history storage. In order to facilitate the use of training again, users can store the training mode. Next time, the training mode only needs to be called. Our products have two dimensional vision tracking and circular vision tracking
Visual Rehabilitation Equipment
Low Vision Devices,Blind Cane,Computers For The Blind,Visual Rehabilitation Equipment
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