Compared with common anchor centering bracket, the anchor rod with centering rings is more convenient and rapid in construction, has low cost and good effect.

本实用新型比目前常用的锚杆对中支架的施工更方便快捷，成本低、效果好。

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The invention discloses a novel labyrinth compressor packing which is capable of automatic centering with a piston rod. The packing is provided with magnets.

本发明公开了一种能够与活塞杆自动对中的新型迷宫压缩机填料。

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