其次，电力网络的典型网络结构有环网、放射型、单端供电型、双端供电型等形式。

Secondly the power network's the typical feature are loop structure , radial type, supply fed at one end and supply fed at two ends.

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实例分析表明，由于桩侧负摩阻力的影响，单桩承载力大为降低。产生负摩阻力的土层，不宜采用端承型桩基。

The greatly reduced capacity of a single pile resulting from the negative friction leaves the end-bearing pile unsuitable in the backfilling soil.

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和高温型单头(单端)电热管(电热棒)。

And high temperature-the first single (single side) whatever (electric Stick).

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