English to Russian Tech/Engineering Construction / Civil Engineering

Строительство метро.

Высокие требования к бетону.

This was a particularly difficult challenge considering that all local cements are blended cements, which generally do not help early strength development.

THE SOLUTION
X identified the challenge much earlier than the competition and provided the contractor with trial support and technical advice ahead of the competitors.

Сомневаюсь в смысле "trial " в данном контексте.

Спасибо.