划线时划针上部向外侧倾斜大致()。A.5°~10°B.10°~15°C.15°~20°D.20°~25°
划线时划针上部向外侧倾斜大致()。
A.5°~10°
B.10°~15°
C.15°~20°
D.20°~25°
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