Which of the following conditions refers to the term 'strength welding'?

The term 'strength welding' is best defined as a pressure-resistant joining method. This process involves the application of heat and pressure to fuse materials together, ensuring a strong bond that can withstand significant mechanical loads and stress. Strength welding is particularly crucial in applications where structural integrity is paramount, such as in construction or the manufacturing of pressure vessels and pipelines.

This technique differentiates itself from other joining methods by focusing on the creation of a joint that can handle substantial forces without failing. While high-temperature fusion processes and permanent adhesive bonding involve combining materials, they do not emphasize the same level of mechanical resistance against pressure. Mechanical fastening, on the other hand, typically involves the use of external fasteners like bolts and screws, which do not achieve the same bond strength as processes classified under strength welding.

Thus, defining strength welding as a pressure-resistant joining method encompasses its fundamental characteristics and applications in engineering.