I want know if the English language has a term that means "design and engineering".
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I guess you are be referring to tech-design or design technology meaning:
'the study, design, development, application, implementation, support and management of computer and non-computer based technologies for the express purpose of communicating, using various mediums, product design intent and constructability as well as to facilitate product operation and maintenance and to ultimately improve overall product design realization, construction, operation and maintenance.'