English to Portuguese Tech/Engineering Petroleum Eng/Sci Liquefied Petroleum test

Boring Sampling Procedure—Remove the heads or covers of barrels or cases.
Open bags and wrappings of cakes.
Remove any dirt, sticks, string, or other foreign substances from the surface of the material.
Bore three test holes through the body of the material, one at the center and the other two halfway between the center and the edge of the package on the right and left sides.
If any foreign matter is removed from the interior of the material during the boring operation, include it as part of the borings.
Put the three sets of borings in individual sample containers and clearly label.

(test holes) - furos de ensaio ??