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某机种涡轮机匣,材料为高温耐热钢GH132,经精车后的有关形状和尺寸如图1所示。设计要求在其上钻92个φ5.5的半边孔和46个φ3的半边孔,如图2所示。
A certain type of turbine casing, material for high temperature heat-resistant steel GH132, after finishing the relevant shape and size shown in Figure 1. The design requires drilling 92 φ5.5 half holes and 46 φ3 half holes on it, as shown in FIG. 2.