Draw the sectional elevation, sectional side view A-A, and plan for the given mechanical elements.

The problem asks to draw the sectional elevation, sectional side view A-A, and plan for the given mechanical elements. Since I cannot draw images, I will describe the steps to construct these views based on the provided orthographic projections.

: Mechanical Element 1 (Top part of the image)

• Given Views: Elevation (Front View) and Side View (Right Side View).
• Cutting Plane A-A: Passes vertically through the center of the $\phi$18 hole in the right arm and the center of the $\phi$12 hole in the left block.

Step 1: Draw the Sectional Elevation
The cutting plane A-A is a vertical plane passing through the centers of the holes. When viewed from the front