On each unit we make scrupulous quality controls and a thorough white testing (Try users without interconnections) according to the internal quality standard and specific requirements of the customer, the documentation relating to the tests and checks carried out is available upon request of the customer as well as all procedures for quality assurance product.

white testing - здесь были варианты в мультитране, но все равно сомневаюсь...

Спасибо.