单项选择题
A.结构胶 B.耐候胶 C.泡沫棒 D.防锈漆
A.±1mm B.±2mm C.±3mm D.±4mm
A.0.1~0.5mm B.0.3~0.5mm C.0.2~0.4mm D.0.5~1.0mm
A.5件；5% B.3件；3% C.5件；10% D.10件；10%
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