Counterfeit products exist many problems: not enough hardness Raceway, no preservation measures, sealed lubrication, ordinary steel alternative high oxidation special steel.
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no preservation measures
无保存措施
以上为机器翻译结果，长、整句建议使用 人工翻译 。
Dry hydraulic system needs no heat preservation measures;
采用干式消火栓系统不需要保温；
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