What is HG and MG material

[BG]

Плиз, помогите кто может....

В график отработки месторождения закладываю

-Produce a HG material, approximately 1.0% Mg
-Produce a MG material, approximately 1.0% Mg

и чуть далее

Both HG and MG material reported to ore with the commencement of mining of the larger pit shells

thanx

[POGOS]

Dumau: HG-Rtut, a MG-Magni.

[Leonid Dzhepko]

HG = high grade
MG = medium grade

[Leonid Dzhepko]

типа с высоким и со средним содержанием полезного вещества