Which of the following is a true statement? Mechanical pencils are used before drawing pens

A radiograph pen is used to draw lines with different thicknesses

Mechanical pens use thick lead

A radiograph pen is used before a mechanical pencil

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A radiograph pen is used to draw lines with different thicknesses

Explanation:

A radiograph pen is a form of a technical pen that is used in drawing most specifically in architectural and engineering drawing.

It comes in different pointing sizes, or in some cases, the stylus can be disassembled to allow changing and replacing it with different styles of different widths to fit in.

For example, a radiograph pen can use a different stylus with a width of 0.35mm, 0.7mm, or 1.4mm, which in turn gives different line thickness when drawing.

Hence, in this case, the correct answer is "A radiograph pen is used to draw lines with different thicknesses."

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