12, the auxiliary machinery required to set up the installation using a range of work surface, can be set up to provide internal mechanical venue FIG range;
12, auxiliary machinery needs to be set up within a certain range of installation work surface, to provide the venue inside can set up machinery range map;
12. The auxiliary machinery shall be erected and used within a certain range of the installation working surface, and the scope map of the machinery that can be erected inside the venue shall be provided;