hydraulic efficiency jack
液压千斤顶
以上为机器翻译结果，长、整句建议使用 人工翻译 。
Traditional method for overhaul of the top of miter gate is through manual operation by hydraulic hoisting jack which has the shortcomings of low efficiency and great risk.
摘要船闸人字门顶门检修的传统方法是采用液压千斤顶手动作业，工作效率低，时间长，技术风险大。
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