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  2. Roller shutter - Wikipedia

    en.wikipedia.org/wiki/Roller_shutter

    Security roller shutters in a dead mall. A roller shutter, security shutter, coiling door, roller door or sectional overhead door is a specialized type of door or window shutter consisting of multiple horizontal slats, bars, or web systems interconnected through hinges. The mechanism involves lifting the door to open it and lowering it to close.

  3. Engineering drawing abbreviations and symbols - Wikipedia

    en.wikipedia.org/wiki/Engineering_drawing...

    EO, ECO, ECN. engineering order. An order from the engineering department (to be followed by the production department or vendor) overriding/superseding a detail on the drawing, which gets superseded with revised information. Also called by various other names, such as engineering change order (ECO), engineering change notice (ECN), drawing ...

  4. ISO 10303-21 - Wikipedia

    en.wikipedia.org/wiki/ISO_10303-21

    ISO 10303-21. STEP-file is a widely used [1] data exchange form of STEP. ISO 10303 can represent 3D objects in computer-aided design (CAD) and related information. Due to its ASCII structure, a STEP-file is easy to read, with typically one instance per line. The format of a STEP-file is defined in ISO 10303-21 Clear Text Encoding of the ...

  5. ISO 10303 - Wikipedia

    en.wikipedia.org/wiki/ISO_10303

    ISO 10303 is an ISO standard for the computer -interpretable representation and exchange of product manufacturing information. It is an ASCII -based format. [1]: 59 Its official title is: Automation systems and integration — Product data representation and exchange. It is known informally as " STEP ", which stands for "Standard for the ...

  6. Engineering drawing - Wikipedia

    en.wikipedia.org/wiki/Engineering_drawing

    v. t. e. An engineering drawing is a type of technical drawing that is used to convey information about an object. A common use is to specify the geometry necessary for the construction of a component and is called a detail drawing. Usually, a number of drawings are necessary to completely specify even a simple component.

  7. Technical drawing - Wikipedia

    en.wikipedia.org/wiki/Technical_drawing

    Technical drawings. Technical drawing, drafting or drawing, is the act and discipline of composing drawings that visually communicate how something functions or is constructed. Technical drawing is essential for communicating ideas in industry and engineering. To make the drawings easier to understand, people use familiar symbols, perspectives ...

  8. FreeCAD - Wikipedia

    en.wikipedia.org/wiki/FreeCAD

    FreeCAD is a general-purpose parametric 3D computer-aided design (CAD) modeler and a building information modeling (BIM) software application with finite element method (FEM) support. [2] It is intended for mechanical engineering product design but also expands to a wider range of uses around engineering, such as architecture or electrical ...

  9. Computer-aided design - Wikipedia

    en.wikipedia.org/wiki/Computer-aided_design

    Computer-aided design (CAD) is the use of computers (or workstations) to aid in the creation, modification, analysis, or optimization of a design. [1]: 3 This software is used to increase the productivity of the designer, improve the quality of design, improve communications through documentation, and to create a database for manufacturing. [1 ...