... 桅下段 lower mast 低压柜 lower pressure tank 下桅支索 lower rigging ...
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lower pressure environment tank 低压舱
lower pressure storage tank 低压储罐
Check availability of hydraulic oil metamorphism, pollution, highly liquid fuel tank is not whether the lower limit markers, the high-pressure piping, joints have leakage.
检查液压油有无变质、污染，油箱液面高度是否不低于正常标记下限，各高压力管、接头是否有泄漏。
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