| 摘要 |
The invention relates to a device for checking pipe systems. It comprises compasses, fitted with two arms 2, 3 joined together by a plane articulation 4, and means 5, 6, 7 for measuring the angle formed between the arms, and at least two slides 12, 13 which are each mounted on one of the arms in a plane perpendicular thereto, and are fitted with means for fitting on to a pipe. <IMAGE>
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