Audi introduces new A4 Avant g-tron; Audi e-gas offered as standard
Green Car Congress
MARCH 7, 2017
The second layer, a composite winding of carbon fiber-reinforced polymer (CFRP) and glass fiber-reinforced polymer (GFRP), provides for maximum strength. The actual bursting pressure is much higher still and far exceeds the legal requirements. With their innovative layout, they weigh 56% less than comparable steel cylinders.
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