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a) survey, sampling, pattern, value, slope, overburden, strike, to sample, to carry out, to outline, to
be devoid of, to confine, to take into consideration, to establish
b) drainage system, sampling pattern, on a grid pattern, dispersion fan, reconnaissance methods,
ground water, base metal value, stream value, metal content, research work, sampling interval,
plant twig, mineral exploration
c) whether, in respect to.
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