Fresnel spotlight
Graphic depiction of a single line set and the parts of a counterweight system. (A) Hoisting cables, (B) Turnbuckles, (C) Purchase line, (D) Arbor rod, (E) Spreader plates, (F) Cut steel counterweight, (G) Locking safety ring, (H) Rope stop/lock (brake)/Lock rail, (I) Tension sheave (block).
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