could you help me proofread some technical phrase please?

I am an engineering student (and translator...) and I've come up against some difficulties while translating a text. Briefly, the company I am working for intends to include some information on a CD and... I was assigned to translate it. I am not an expert in technical English (and not a native speaker...), so I searched and searched the net in order to get a "native sound" of the terms and phrases... But I am not sure at all if it sounds right. Any help from you guys would be of great help. These are the products and services I strived to translate:

Projects for new machines, plant, technological lines, test stands, equipment for modernizing various industrial branches

Conventional and non-conventional technologies for metal processing, surface preparation, including through painting, for dismountable and non-dismountable assembly (welding-riveting)

Assembly, mechanization and automation of the industrial activity for plants in our country and abroad

Studies, projects and prototypes, machines, equipment for protecting and depolluting the environment

Manufacturing, trading, assembling, putting into operation and providing technical assistance for equipment, assemblies, plant, technological lines to internal and external beneficiaries

Computer-assisted engineering activities and research

Carrying out and trading studies, projects and other works for diagnosing, re-technologizing, prioritizing, rendering profitable and systematizing plants in Romania and abroad

Marketing and forecast studies

Activities of consultancy, servicing, technico-economic assessment

Organizing technical demonstrations, fairs, stationary and touring exhibitions, trading licences, know-how inventions, engineering works

Are they correct? Do you think you could help me with some better versions?