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Hook Locks For Trucks, Vans and Skip-Loaders The Crosby Group has a large assortment of hook locks for trucks, vans, and skip-loaders. We offer self-locking hooks with clevis to prevent pinching, ball-bearing swivel hooks for improved side stability and lighter weight; and galvanized hooks to resist corrosion. The effectiveness of the hook-lock mechanism was analyzed using a combination of a numerical continuance algorithm and bifurcation theories. Nine state variables were identified.
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