While assembling the utility model, the structure prevents locating errors and reverse cover board arrangement.

在装配产品时, 该结构也能起到定位防错作用,防止盖板位置装反.

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With thickening oil - tank cover - board, it makes acting noise of oil pump and solenoid valve smaller.

加厚的油箱盖板使油泵和电磁阀的动作噪音更小.

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