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Automatic overturning and coal-blending device
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Coal blending weighing hopper
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Torque limiting device at variable-amplitude fixed end of crane
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Stay-rope fixing device for arm rest
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Head four-rope hoisting wheel group
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Reinforced four-rope multi-petal grab bucket
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Stable amplitude variable pulley block
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Multifunctional floating type crane
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Multifunctional fixed crane
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Novel bolt
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Hexagon bolt
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Fastening bolt
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Anti-retreating bolt
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Lengthened bolt
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