1. contingency measures can also set the post apart from the pillar collapsed location could collapse, best line with the display of exhibits.2. in addition to spare car ready reserve exhibits.
1. In addition to the contingency measures pillars collapsed pillars may collapse can also set the position to select the best display mode exhibits with moving lines. 2. In addition to spare car but also ready to spare the exhibits.
1. In addition to the collapse of the pillars strain measures can also set columns may be collapsed position, choose the best movement with exhibits display.2 in addition to the spare car to prepare spare exhibits.