Оригинал: With regards to project execution, our project engineers have extensive experience in building process equipment to the highest QA levels. Only sub-suppliers with extensive experience in the manufacture of this type of equipment for the oil and gas industry and the relevant QA HSE approvals and qualifications are used.

Меня последняя строчка немного в тупик поставила. Не могу никак увязать слова QA HSE approvals and qualifications are used

Заранее спасибо за помощь