Box type girder hoisting device
The utility model belongs to the technical field of box type girder body mating workpieces, and particularly relates to a box type girder hoisting device. According to the technical scheme, the box type girder hoisting device comprises an L-shaped steel plate, a first moving plate and a second moving plate which are connected by a shaft are arranged at two ends of the steel plate, and the ends of the first moving plate and the second moving plate are connected by a third moving shaft; and a left hoisting ring and a right hoisting ring are arranged at two ends of the first moving plate or of the second moving plate. The box type girder hoisting device not only can be repeatedly used, but also can overcome the defect that the hoisting rings arranged on a girder body influences the usability of the girder body.
Abstract : The purpose of this thesis is to evaluate the systems engineering effort by the Aviation Research and Development Activity (AVRADA), the Airborne Engineering Research Activity (AERA), and support contractor DOSS to install the Trimble Global Positioning System (GPS) receiver onto Army helicopter platforms. This study is an example of a successful systems engineering effort to install a non-developmental item (NDI) onto existing aircraft platforms in response to an urgent requirement created by the deployment of aircraft for Operation Desert Shield.