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The racquet is now set to be vertical at contact.
网拍现在在接触点是设定垂直的。
youdao
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Please see page 51, How to be Consistently Vertical at Contact.
请见到第51页，如何在接触中一致地保持垂直。
youdao
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Please see page 51, How to be Consistently Vertical at Contact.
请见到第51页，如何在接触中一致地保持垂直。
youdao