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EXPERIMENTAL DERRICK AND LADDER ASSEMBLY
EXPERIMENTAL DERRICK AND LADDER ASSEMBLY
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机译:实验井架和梯子组件
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摘要
Elongate straight beam for demonstrating equilibrium phenomena in classroom physics instruction includes bearing members rotatably mounted at beam ends by pins transversely disposed relative to longitudinal centerline of beam. Lugs rotatably secured to pins at longitudinal centerline of beam have openings for attaching coplanar forces to beam.
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