But the entry Angle and the depth of the screw must be accurate.

但要注意进钉的角度、方向和深度，同时宜采用相应的加强螺钉稳固性的措施。

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An effective arm position can be achieved by a downward entry Angle.

有效的入水方式能靠向下的入水角度来获得。

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An effective arm position can be achieved by a downward entry Angle.

有效的入水方式能靠向下的入水角度来获得。

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