作业的前三个ESP由第三方供应商提供，由于连续出砂，ESP工作时间均不超过一个月。
The first three ESPs were supplied by a third-party provider and each of them failed in less than a month due to excessive solids production.
作业的前三个ESP由第三方供应商提供，由于连续出砂，ESP工作时间均不超过一个月。
The first three ESPs were supplied by a third-party provider and each of them failed in less than a month due to excessive solids production.
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