短语词组短语erector arm [机]起重臂;起重臂machine erector 机器安装工Erector Set 建造模型Erector beam 安装机梁roll erector 竖卷机;倾斜修正器transporter erector 运输竖起车erector spine 竖脊肌Erector Launcher 举升式发射器;举升式发射载具precast erector 预制件安装工人 返回 erector