collapsible bitexpa ive bitexpansion bitexpansive bitpaddy bit伸缩: stretch out and draw back; e ...式: type; style钻头: boring crown; bore bit; dril ...伸缩式钻架: telescopic derrick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
