单项选择题
A.HMIS B.22 C.合格证 D.120/120-1型货车空气控制阀主阀检修记录
A.10s B.20s C.30s D.40s
A.2 B.S C.8 D.Z
A.索赔 B.报废 C.合格 D.检修
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