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Why You Should Install a Hook Lock Hook locks prevent thieves from stealing your van's contents by securing the door of your vehicle. They also decrease the chance of workplace accidents caused by malfunctioning spring latches on standard sling hooks that fail to snap shut when not in use. This paper uses bifurcation and numerical continuation theories to study the motion characteristics of the mechanism for hook locks. The influences of the weight of the landing gear and locking spring paramet
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