A.0.1% B.0.2% C.0.5%
A.10mm B.20mm C.50mm
A.+5、-2 B.+6、-2mm C.+5、-2mm
A.50mm B.100mm C.150mm
A.应先按下电磁铁按钮，再按下电机旋转按钮 B.应先按下电机旋转按钮，再按下电磁铁按钮 C.以上两项都行
