Expenses for repairing and maintenance were reduced after the 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....

deashing的音标：deashing的英式发音音标为：['di:ʃɪŋ]deashing的美式发音音标为：['diʃɪŋ]...

清灰，去灰分...