• a medium thick line composed of short dashes about 2-3 mm long with space between dashes about 1-2 mm wide

• it represents the surface or edges that cannot be seen

•  thin line consisting of two long dashes and short dash drawn alternately with a gap of at least 2 mm in between

a thin lines ton that shows the surface which has been cut/45 degrees

(a)  

a thin line that extends from the object in order to show dimension limits

(a)  

• a thin line with an arrowhead in one end which is used to indicate the measurement of an object

a thick line drawn in freehand to show details that a part has been cut off or broken out.

(a)  

• a medium thick line consisting of broken and straight lines drawn alternately

• known also as limiting line

a short inclined thin line with an arrowhead at the end and short horizontal line on the other end

(a)  

• a thin line that shows position(s) of part of an object  that moves drawn by two short dashes and one long dash

• a thick lines used to indicate an imaginary cut through an object along the line