However, it is difficult to select suitable material of model pipes for larger model scale.
但对于较大模型比尺，很难找到理想的模型材料。
The control and prevention measure i. e. to reduce mental material tensile stress, select suitable material, control of media environment and scheduled maintenance to the pipe is put forward ai...
针对凝汽器用不锈钢焊管产生应力腐蚀开裂问题提出了抑制和防范措施，即降低金属材料拉伸应力，选择合适的材料，对介质环境的控制和对钢管的定期维护保养。
Select the suitable wheel. Need wheel to grind base on the workpiece material, rigidity and manufacturing requirement.
应根据工件材料、硬度及加工要求，选择适当的砂轮进行磨削。
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