Sapper Geologist
@SapperGeologist
Army Reserve SME: military engineer + interests in critical materials, subterranea & military geology. Views and beard are my own. RTs not endorsements.
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December 2017
944 ํ๋ก์ ์ค 2.2K ํฌ
@traysartech @SpencerGuard
Urban drilling / tunnelling technology.
Thanks to @ianvisits for the original post ๐๐ป
