... pull test machine 拉伸试验机 pull through machine 穿料装置 pull up riser 穿插式升气管 ...
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pull-through machine 穿料装置
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Then innocent-looking Korean tourists outside the White House suddenly pull machine guns and explosives out of their backpacks, blast through the fence, and fight their way in.
NEWYORKER: Rough Rides
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