HG91003

The steps for the design of this exercise in AutoCAD are as follows:

Command: LIMITS
Reset Model space limits:
Specify lower left corner or [ON/OFF] <0.00,0.00>: 0,0
Specify upper right corner <420.00,297.00>: 150,150

Command: LINE
Specify first point: 0,0
Specify next point or [Undo]: @20,0
Specify next point or [Undo]: @0,74
Specify next point or [Close/Undo]: @60,0
Specify next point or [Close/Undo]: @0,-74
Specify next point or [Close/Undo]: @20,0
Specify next point or [Close/Undo]: @0,90
Specify next point or [Close/Undo]: @-100,0
Specify next point or [Close/Undo]: @0,-90

Command: REGION
Select objects: Specify opposite corner: 8 found
1 loop extracted.
1 Region created.

Command: EXTRUDE
Current wire frame density:  ISOLINES=4, Closed profiles creation mode = Solid
Select objects to extrude or [MOde]: 1 found
Specify height of extrusion or [Direction/Path/Taper angle/Expression]: 80

Command: CYLINDER
Specify center point of base or [3P/2P/Ttr/Elliptical]: 40,40
Specify base radius or [Diameter]: DIAMETER
Specify diameter: 32
Specify height or [2Point/Axis endpoint] <80.00>: 100

Command: SUBTRACT
Select solids, surfaces, and regions to subtract from ..
Select objects: 1 found
Select solids, surfaces, and regions to subtract ..
Select objects: 1 found

Command: FILLET
Current settings: Mode = TRIM, Radius = 2.50
Select first object or [Undo/Polyline/Radius/Trim/Multiple]:
Enter fillet radius or [Expression] <2.50>: 40
4 edge(s) selected for fillet.

Command: CYLINDER
Specify center point of base or [3P/2P/Ttr/Elliptical]: 50,40
Specify base radius or [Diameter] <16.00>: DIAMETER
Specify diameter <32.00>: 80
Specify height or [2Point/Axis endpoint] <100.00>: 24

Command: CYLINDER
Specify center point of base or [3P/2P/Ttr/Elliptical]: 50,40
Specify base radius or [Diameter] <40.00>: DIAMETER
Specify diameter <80.00>: 60
Specify height or [2Point/Axis endpoint] <-24.00>: 24

Command: SUBTRACT
Select solids, surfaces, and regions to subtract from ..
Select objects: 1 found
Select solids, surfaces, and regions to subtract ..
Select objects: 1 found

Command: CYLINDER
Specify center point of base or [3P/2P/Ttr/Elliptical]: 50,40
Specify base radius or [Diameter] <30.00>: DIAMETER
Specify diameter <60.00>: 32
Specify height or [2Point/Axis endpoint] <-24.00>: 16

Command: SUBTRACT
Select solids, surfaces, and regions to subtract from ..
Select objects: 1 found
Select solids, surfaces, and regions to subtract ..
Select objects: 1 found