A.固定杠桿 B.移動杠桿 C.下拉桿 D.中拉桿
A.21t B.22t C.23t D.25t
A.1.0 mL/100mL~2.5 mL/100mL B.1.2 mL/100mL~2.5 mL/100mL C.1.3 mL/100mL~2.5 mL/100mL D.1.4 mL/100mL~2.5 mL/100mL