Only some parameters such as theoretical A/F ratio and modified coefficients of sub models needed to modify little, when simulating the characteristics of engine using different gas.
当燃用不同的燃气时，只需对其中的一些参量（如理论空燃比等）及子模型的修正系数进行微调即可。
2
The results show that the optimal bottle performance requires modified screw, processing parameter, parison design and stretch ratio.
结果表明，为了得到理想的制品外观和性能，需要对挤出螺杆、加工工艺参数、型坯设计和拉伸比进行改进。
3
It shows that the modified overall calculation method is more scientific and rational and exact on mix ratio design of self-compacting concrete.