The raw materials and the pretension method are improved.
对原材料和预张拉方法进行改进。
A pretension method for major diameter bolts using hydraulic stretching equipment is introduced.
介绍了一种大直径螺栓的预紧方法液压拉伸预紧法。
The picking up method, meaning and clearing of failure codes of the electronic seat belt pretension unit are introduced, and precautions in troubleshooting are pointed out.
介绍了电子式安全带预紧装置故障代码的提取方法、故障代码的含义及故障代码的清除，并指出了检修时应注意事项。
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