duplex design tubular derrick双管: double-barrelled伸缩: stretch out and draw back; e ...式: type; style钻塔: derrick; rig; drill tower; b ...伸缩式钻塔: telescope mast; telescopic derrick; telescoping derrick下载手机词典可随时随地查词查翻译关注微信公众号：chachacidian，回复:双管伸缩式钻塔，即可在微信中查询翻译
