Audi introduces new CNG A3 Sportback
Green Car Congress
SEPTEMBER 16, 2020
The ultra high-strength outer shell comprises two layers: an inner layer of carbon fiber-reinforced polymer (CFRP) and an outer layer of glass fiber-reinforced polymer (GFRP). The inner layer is a gas-tight polyamide vessel. The GFRP layer also has a safety function: It turns a milky white if damaged.
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