Mechanical components, drive systems, and structural elements of a single-axis solar tracking array.

The structural hardware and weatherproofing components of a pitched-roof solar panel mount.

Key structural and geotechnical components used to stabilize a rock slope at a tunnel portal entrance.

Cross-sectional components of a standard mechanical seal assembly used in centrifugal pumps to prevent fluid leakage.

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Key structural, exterior, and interior architectural elements of a medieval Gothic cathedral.

The fundamental components that make up a basic direct-current electrical circuit.

The external structures and primary flight control surfaces of a modern passenger jetliner.

The major architectural parts of classical Greek temples across the Doric, Ionic, and Corinthian orders.

Six common mechanical gear types and transmission arrangements.