| 摘要 |
The invention relates to a connecting piece 3, which is used when extending driven posts of steel tubing, the said piece in shape comprising two abutting conical parts 5, 6 tapering away from one another, on which the pole extension pieces fit, and a flange between the conical parts. The said flange 7 is provided with at least one annular groove 8 for receiving the end or ends 9 of the post tube 2 in the post connection. <IMAGE>
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