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sample survey questionnaire for research

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BACKPACK CORE RIG Core surface drilling core drilling rig 1. This portable rig is designed for mineral exploration, oil field survey, geological resea...

Time : Dec,09,2024
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BACKPACK CORE RIG Core surface drilling core drilling rig 1. This portable rig is designed for mineral exploration, oil field survey, geological resea...

Time : Dec,09,2024
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Portable Backpack Borehole Drilling Machine The backpack borehole drilling machine is lightest shallow sampling drill machine. It is specially designe...

Time : Jul,10,2025
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