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【多选题】
制动器年度保养检查的检查内容和要求是( )。A.
调整制动弹簧，以保证平层准确度和舒适度
B.
调整清洁铁心，加适量润滑剂
C.
制动瓦磨损超过原厚度１/４或铆钉露出更换
D.
制动瓦磨损超过原厚度１/２或铆钉露出更换
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B.
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C.
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D.
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In
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