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https://docs.google.com/gview?url=http://www.geethanjaliinstitutions.com/engineering-drawing.pdf&chrome=true

http://www.geethanjaliinstitutions.com/engineering-drawing.pdf

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DRAWING STANDARDS....

DRAWING STANDARDS

• Drawing standards are set of rules that govern how the technical drawings are represented
• these are used so that every one can commonly understand the meaning of drawn picture

  Drawing sheet

we have many types and sizes of drawing sheets..  like A4,A3,A2,A1,A0 etc

while in the drawing sheet .. first we have to draw border lines and title box and then we have to start drawing

lettering

lettering and numbering should be in a perfect manner.. for example in this figure.. the upper and lower case letters  are neatly draw

    lines and its types 

basically lines which are used in the representation of the diagrams are of mainly 4 types they are

• Visible line : represent features that can be seen in the current view
• Dimension line ;Extension line;Leader line: indicate the sizes and location of features
• Hidden line : represent features that can not be seenin the current view
• Center line: represents symmetry, path of motion, centers of circles, axis of axisymmetrical parts

In this way we use different types of lines in the drawing

this week jobs 19-9-2014

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