What does the term 'fabric seams' refer to?

The term 'fabric seams' specifically refers to the areas where two pieces of fabric are joined together. In aircraft fabric covering, seams are crucial as they must be strong and durable to withstand the various stresses that the fabric will encounter during operation, such as tension and movement. Properly constructed seams are essential for ensuring the integrity and safety of the fabric covering, as they prevent tearing or separation that could compromise the aircraft's overall performance.

The other options do not accurately describe fabric seams. The width of fabric rolls pertains to the dimensions of the fabric itself rather than how it is assembled. The design of the aircraft refers to its overall aesthetics and functionality, while the layers of paint applied are related to finishing and protection, not the fabric joining process. Understanding fabric seams is essential for anyone involved in aircraft covering practices, as it directly impacts the craftsmanship and strength of the completed fabric structure.