🧵 Double Fisherman’s Knot หรือ Double Overhand Bend
Reference
– Low Angle Rope Rescue Operational, Instructor and Student Manual. State Fire Training. 2007.
– Holtzman O. The Field Guide to Knots. The experimnt.
– Knots you need to know. Fox Chapel.
🧶 เงื่อนเชือกสำหรับกู้ภัย Ver.4
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~A Simplified Solo Traveller
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