| 摘要 |
The invention relates to the technical field of shutter equipment. The device, according to the invention, comprises a socket 1 of great length bearing and being centred through a suitable opening on at least two parallel and consecutive strips 2a, 2b defining a cell 2c, the said socket receiving the threaded end of the tail or extension piece 3a of a part protruding outwards with respect to the external plane of the building block or equivalent construction element. <IMAGE>
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