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   英语
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短语
"A" frame
电力线路 słup A
 英语 词库
A-frame ['eɪ'freɪm]
油和气 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
A" frame: 2 短语, 2 学科
一般1
植物生长1