单项选择题
A.涂料干燥过慢B.涂料干燥过快C.刷毛太软D.施涂用力太轻
A.1:6:(10-18)B.1:7:(9-15)C.1:5:(10-15)D.1:4:(11-16)
A.30B.60C.90D.120
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