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Daniel Wiensさんによる編集

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[* black] Insert wisdom hereThis particular pump is using a tripod with a block and tackle to lift the riser main. C-wrenches may also be used to lift the riser main.
[* black] Securely clamp and tighten the pipe elevator to the riser main
.
[* black] Insert wisdom hereThis particular pump is using a tripod with a block and tackle to lift the riser main. C-wrenches may also be used to lift the riser main.
[* black] Securely clamp and tighten the pipe elevator to the riser main
.