Since the purpose is to minimize alteration, a fresh core has often been drilled with a bland mud, either water - or oil-base, but with a minimum of chemical additives and weighting material.
3
那么，在增加重量和，增加力之间，我们拿去重物，看它是否会复原。
And then, in between increasing the weight, increasing the force we will take the masses off to see whether they return...
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