Example sentences of "[vb pp] back up the [noun sg] " in BNC.

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1 This makes it very difficult for the mains to be contaminated by dirty water ( from a bath , say ) being sucked back up the mains — a phenomenon known as back siphonage .
2 Once she was safely winched back up the slipway into the lifeboat shed , I spoke to some of the crew .
3 John could tell that it was being driven back up the hill towards Putna .
4 In this way , liability is passed back up the chain of distribution to the manufacturer .
5 Paul had climbed back up the embankment — with the post sticking out of his body .
6 The light travels down an open tube until it hits a curved mirror at the bottom ; the rays are then sent back up the tube on to a smaller , flat mirror placed at an angle of 45 degrees , so that the rays are directed into the side of the tube , where an image is formed and magnified by an eyepiece .
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