单项选择题
A.5mm B.10mm C.15mm D.20mm
A.2~3mm B.2~5mm C.2~6mm D.2~10mm
A.20mm B.30mm C.40mm D.50mm
A.淡黄色(Y06) B.白色(RAL9016) C.黑色(RAL9017) D.红色(R03)
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