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开始学习
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开始学习
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开始学习
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开始学习
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开始学习
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开始学习
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开始学习
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apoplicatins in minig and the oil industries
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开始学习
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setting out positions and levels of new structuers
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开始学习
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air ataffic control, navigation and vegicle tracking
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开始学习
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navigation and safety at sea
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开始学习
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开始学习
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开始学习
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开始学习
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开始学习
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开始学习
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some kind of trash in space
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开始学习
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开始学习
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开始学习
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device with spinnig blades
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开始学习
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has low energy consumption
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开始学习
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开始学习
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开始学习
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开始学习
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开始学习
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has low energy consumption
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开始学习
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开始学习
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column going in the ground
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开始学习
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开始学习
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part of the structurebelow ground
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开始学习
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concrete poured on the consturction site oin its final position\
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开始学习
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开始学习
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开始学习
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individual part of mechanism
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开始学习
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liquid used to reduce friction
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开始学习
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开始学习
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fibres inside material used to strenghten it
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开始学习
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vertical column of concrete
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开始学习
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device which transform energy in motion
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开始学习
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resistant of a object to acceleration or deceleration due to its mass
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开始学习
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开始学习
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开始学习
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mechanism containg balls or rollers placed around a component
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开始学习
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开始学习
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开始学习
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开始学习
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开始学习
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开始学习
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rock from which metal can be extracted
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开始学习
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timber from decidious trees
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开始学习
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type of steel, not rusting
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开始学习
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开始学习
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开始学习
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开始学习
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开始学习
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开始学习
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material transformed by heat
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开始学习
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开始学习
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system for evacuating smoke
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开始学习
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开始学习
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reinforced bulk materials
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开始学习
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powder mixed with water to make concrete
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开始学习
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开始学习
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开始学习
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开始学习
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resistance to damage caused by frictions
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开始学习
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resistance to problems caused by temperature
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开始学习
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开始学习
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开始学习
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pads to induce deceleration
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开始学习
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开始学习
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pneumatic evelopes in contact with the road
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开始学习
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开始学习
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capable of resisting gunshots
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开始学习
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开始学习
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material enable to carry heat or electricity
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