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Gold Prospecting
Do It Yourself (DIY) Projects
Summer shade
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<blockquote data-quote="Rockhunter62" data-source="post: 516178" data-attributes="member: 7504"><p>I'm fairly certain that the inner tube is for the drill sample to come back up. The air is forced down between the inner and outer tubes and blows all the ground material (drill sample) back up the inner.</p><p></p><p>Cheers</p><p></p><p>Doug</p></blockquote><p></p>
[QUOTE="Rockhunter62, post: 516178, member: 7504"] I'm fairly certain that the inner tube is for the drill sample to come back up. The air is forced down between the inner and outer tubes and blows all the ground material (drill sample) back up the inner. Cheers Doug [/QUOTE]
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Gold Prospecting
Do It Yourself (DIY) Projects
Summer shade
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