带定位环，保持注水流畅；

Retaining ring for continuous flow of water ;

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各组定位环先后起到了使张力均匀的作用。

Each group of holding rings sequentially ACTS on the tension so that the tension can be uniform.

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柱脚预埋锚栓均采用定位支架、定位环板控制其安装精度。

Location bracings and annular plates are adopted for embedded anchor bolts to control installation precision.

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