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right-angled triangle
(n) a flat shape with three straight sides, one
corner of which is square
rocket
(n) a tube-shaped vehicle that can travel in space
satellite
(n) a machine that travels in space around the Earth
sewing machine
(n) a machine that can join cloth or clothes together
signal
(n) a message, usually sent over a long distance
spear
(n) a long stick with a sharp end used for fighting
telegraph
(n) an old way of sending messages using electricity
transistor
(n) a piece of electronic equipment used in radios and TVs
vacuum cleaner
(n) a machine that sweeps up dirt from floors
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