控制单元设有预设的举升高度，左柱上安装有自动挡块。
Control unit with preset lifting height and automatic stop fitted at the left pillar.
电动潜油离心系有效举升高度的大小是电泵井工作性能优劣的重要依据之一。
The effective lift height of electric submersible centrifugal pump is one of the important basis in judging work performance of electric pump wells.
影响气举方式选择的因素有：井的产率、井底压力、产液指数、举升高度及注气压力等。
Factors affect gas lift options: the yield of the well bottom-hole pressure, fluid production index, lifting height and the gas injection pressure.
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