()是指起重机每日作业前、运转中及作业后，为及时发现隐患，保持良好的工况进行的检查和预防性保养。
更新时间:2024-11-02 11:36:04 A、定期保养C
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MarkTwain’sparticularconcernaboutthelocalcharacterofaregioncameaboutas“localcolorism,”auniquevariationofAmericanliterary().
Eachofusshould_______asideafewminutestohavearesteveryday.
InclassifyingtheEnglishconsonantsandvowels,thesamecriteriacanbeapplied.
Thenoiseofthepartystoppedmegetting________________sleep.
Whathehaddoneis_______
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