求翻译：I've a problem: due to old modification on the old piston 8861120002 (that actually is 61120068 and will become 61120070) I've residual component at warehouse and to use up them I would like to receive again 6000 pistons 8861120002 (it's only my idea, I don't know if our engineering will accept it). The different between it and 61120068 is only on the machining, but I don't know if the recent modification of the mould still allow to produce the old version.是什么意思？

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