Expenses for repairing and maintenance were reduced after the low frequency sound wave deashing device was used.

经采用低频声波清灰装置，减少了检修和维护的费用。

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Expenses for repairing and maintenance were reduced after the low frequency sound wave deashing device was used.

经采用低频声波清灰装置，减少了检修和维护的费用。

youdao