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322Trenchless utility and pipeline installation after confirming bore length, ground conditions and pullback requirements.
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329Drilling rock and surface holes after confirming hole diameter, depth, formation and air requirements.
330Coring and geotechnical investigation after confirming hole depth, core size and ground conditions.
331After confirming the hole depth, core size, and formation, coring and geotechnical investigation are carried out.
332Coring and geotechnical investigation after confirming hole depth, core size and ground conditions.
333After confirming hole depth, core size and formation, coring and geotechnical investigation are carried out.
334Coring and geotechnical investigation after confirming hole depth, core size and ground conditions.
335Coring and geotechnical investigation after confirming hole depth, core size and ground conditions.
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