سوال ۱۲ کنکور ارشد مهندسی مکانیک ۱۴۰۵

PASSAGE 1 (paragraph 1): "Drafting or technical drawing is used in nearly every branch of engineering and architecture. It is the means by which mechanical engineers create instructions for manufacturing parts. A technical drawing can be a computer model or hand-drawn schematic showing all the dimensions necessary to manufacture a part, as well as assembly notes, a list of required materials, and other related information. A U.S. mechanical engineer or skilled worker who creates technical drawings may be referred to as a drafter or draftsman. Drafting has historically been a two-dimensional process, but recent Computer-Aided Designing (CAD) programs have begun to allow the designer to create a part in three dimensions."

The underlined word “which” in paragraph 1 refers to «..........» .