圆形、长条形光斑可选Optional: circular or elongated light source 检测角度checking angle 光线被测物表面垂直允许偏差±15°vertical with surface with±15°tolerance ..
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angle checking 角度查验
switch of checking phase-angle 相位角检测开关
Checking Tiny Inclining Angle 检验微小倾角
Finally, the home side found the breakthrough their dominance deserved, Martyn Williams checking the Quins defence before his pop-pass found Hewitt cutting a superb angle.
BBC: Blues 23-12 Harlequins
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