法兰螺栓孔 meaning in English

flange-bolt-hole

Bolts are ground and flange holes are calibrated for perfect centering of the two flanges in respect of each other
螺栓经过打磨，法兰螺栓孔也经过校准，实现了2个法兰相互之间的完美对中。
Further more , the fracture possibility is analyzed with fracture mechanics after the stress calculation of local high stress area around the bolt hole in shell flange and the measurement of fracture toughness of gray cast iron . the improving structure of bolts connected head and shell flange is brought forward
此外，在计算获得缸体法兰螺栓孔局部高应力区的应力水平后，由断裂力学分析发生脆性断裂的可能性，并提出烘缸缸体与缸盖联接结构的改进方案。