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"A" frame
pwr.lines.
A-stolpe
English thesaurus
A-frame
['eɪ'freɪm]
O&G
an A-shaped lifting device
;
the A-shaped, highest portion of a standard derrick on a drilling rig that is used to support the crown block
;
the stationary, A-shaped structure that supports and anchors in upright position the mast of a jackknife rig on a drilling rig
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