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注:你正在编辑的一份前提条件指南。你所做的任何更改将影响包括此步骤的3指南

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正翻译步骤 21

步骤 21
Carefully lower the riser main, horizontally, and place it in a sanitary place, preferably resting above the ground, to prevent contamination. Carefully lower the riser main, horizontally, and place it in a sanitary place, preferably resting above the ground, to prevent contamination. Carefully lower the riser main, horizontally, and place it in a sanitary place, preferably resting above the ground, to prevent contamination.
  • Carefully lower the riser main, horizontally, and place it in a sanitary place, preferably resting above the ground, to prevent contamination.

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