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Jeff Suovanen编辑

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步骤行

[* black] Being careful not to let the rope slip, use the block and tackle to lift the riser main until the pipe elevator reaches the block and tackleWakachenjerera kuti tambo isatsvedze, shandisa zvinodhonza mubato netambo kusimudza pombi refu kusvikira zvinosimudza pombi zvasvika pane zvinodhonza netambo.
[* black] Being careful not to let the rope slip, use the block and tackle to lift the riser main until the pipe elevator reaches the block and tackleWakachenjerera kuti tambo isatsvedze, shandisa zvinodhonza mubato netambo kusimudza pombi refu kusvikira zvinosimudza pombi zvasvika pane zvinodhonza netambo.