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正翻译步骤 2

步骤 2
Add the other two lifting arms. Ensure three things about the arms: They must be equally spaced around the riser main (120° apart).
  • Add the other two lifting arms.

  • Ensure three things about the arms:

  • They must be equally spaced around the riser main (120° apart).

  • The arms must not touch each other, the coupling at the top, or the pipe vise at the bottom.

  • The openings should alternate, to keep the riser main secure.

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