Belay MPD as a Belay Device
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Building a Load Release Hitch
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CMC Rescue MPD User's Guide by CMC Rescue School Instructor | CMC
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4:1 mechanical advantage
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Petzl ID Basics
16:40
I never understood why you can't go faster than light - until now!
2:36
7 540 Rescue Belay
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3:1 Mechanical Advantage
10:15