试译如下：Standard:clean case surface, neat joining layout.Steps and requirements:1.assemble the case and the front panel according to Figure 12.fix the chasis into the case firmly, pay attention to mounting direction3.connect the front panel to the chasis, weld with the heat shrinkable tube4.finish connection5.the specific connections as shown in Figure 56.case cleaningNote: 1.heat shrinkable tube should be welded with at all joinings2.joinings need to be fixed properly