com-four® Pulley for children aged 8 and up, pulley up to max. 15 kg (green) : Amazon.de: Business, Industry & Science
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Pulley Rope Maximum Hook Load 500 kg with 40 m Quality. : Amazon.de: Business, Industry & Science
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Low-cost double pendulum for high-quality data collection with open-source video tracking and analysis - ScienceDirect
kwb Pulley 3-way lifting height 3.6 m, maximum load 180 kg, nylon rope : Amazon.de: Business, Industry & Science