X线深部治疗机故障，当X线剂量率下降时可能的原因是

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SQL Error: select id,body,options from ***_enewstiku where sourceid='29409' and id < 2394766 and id<>'2394766' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='29409' and id > 2394766 and id<>'2394766' order by id asc limit 5