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Silencer, and rock drill with silencer
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Guard pipe unit
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Device for removing substance floating up to liquid level
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Gravity-type bidirectional automatic rock drill
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Chain rotation automatic rock drill
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Bit for rock drill having cutting blades attached to side and under surfaces thereof
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Power generation basic system using gravity by rotation system
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Buoyancy using power generating system by elevating, rotation system
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Buoyancy applying power generation basic system by lifting-rotation system
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Rotary type centralized control system for planting
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Paving rake with rule
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Paving stabilization controller
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Plate compacter with high temperature liquid
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Plate compactor with heater
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Tamper with gas burner
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Indication and control system for finisher
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Paving controller of finisher
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Paving controller for finisher
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Paving controller guide frame for finisher
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Apparatus for displaying gradient
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