To install the crane span before installation, camber, level of metal structure of main girder bending, trolley rail height difference, gauge deviation, diagonal bridge survey.
安装前要对起重机安装跨度，金属结构主梁的拱度、水平旁弯，小车轨道高低差、轨距偏差，桥架对角线等进行测量。
This article gives the meaning of making the serial standards for the fabrication and installation of metal structure, the structure and composition of standard and its relationship with trade norm.
阐述了三峡工程金属结构设备的制造安装系列标准编制的意义、标准的结构和组成以及与行业规范的关系。
The installation technique for low temperature storage tank with double layer metal structure is mainly divided into normal assembly method and inverted assembly method.
双层金属结构低温储罐的安装工艺主要有正装法和倒装法。
Block proof cover can be made of metal or widely used PVC plastic, the structure is simple for the convenience of installation.
防堵罩可采用金属或使用广泛的PVC塑料制造，结构简单，安装方便。
Block proof cover can be made of metal or widely used PVC plastic, the structure is simple for the convenience of installation.
防堵罩可采用金属或使用广泛的PVC塑料制造，结构简单，安装方便。
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