Mechanical Drawing Symbols

Mechanical Engineering solution — 8 libraries are available with 602 commonly used mechanical drawing symbols in Mechanical Engineering Solution, including libraries called Bearings with 59 elements of roller and ball bearings, shafts, gears, hooks, springs, spindles and keys; Dimensioning and Tolerancing with 45 elements; Fluid Power Equipment containing 113 elements of motors, pumps, air compressors, meters, cylinders, actuators and gauges; Fluid Power Valves containing 93 elements of pneumatic and hydraulic valves (directional control valves, flow control valves, pressure control valves) and electrohydraulic and electropneumatic valves; as well as many other sophisticated symbols and templates for your use.

ERD Symbols and Meanings

Crow's foot notation is used in Barker's Notation, Structured Systems Analysis and Design Method (SSADM) and information engineering. Crow's foot diagrams represent entities as boxes, and relationships as lines between the boxes. Different shapes at the ends of these lines represent the cardinality of the relationship.
The Chen's ERD notation is still used and is considered to present a more detailed way of representing entities and relationships.
To create an ERD, software engineers mainly turn to dedicated drawing software, which contain the full notation resources for their specific database design - ERD symbols and meanings. CS Odessa has released an all-inclusive Entity-Relationship Diagram (ERD) solution for their powerful drawing program, ConceptDraw DIAGRAM.