词汇	牵甩杆起重机
释义	牵甩杆起重机 guy derrick
随便看	secondary urethra secondary urethrocele secondary urinary duct secondary use secondary-use secondary use bag with secondary use secondary user Secondary User Unit Secondary uterine inertia secondary utilization secondary vacuum Secondary-vacuum volts secondary valence secondary valence, auxiliary valence secondary valence bond secondary valence force secondary valency secondary value secondary valve secondary variable secondary variables secondary variable selection secondary variance secondary variation in depth secondary vascular bundle