制动轮是门座式起重机制动装置的关键零件，制动轮在生产制造和使用过程中的早期失效及热处理缺陷是影响生产成本及效率的重要因素。
The brake wheel is a key part of portal frame crane, and its earlier failure and heat treatment defect during manufacture and use is the key factor, which affects the cost and efficiency.
制动轮是门座式起重机制动装置的关键零件，制动轮在生产制造和使用过程中的早期失效及热处理缺陷是影响生产成本及效率的重要因素。
The brake wheel is a key part of portal frame crane, and its earlier failure and heat treatment defect during manufacture and use is the key factor, which affects the cost and efficiency.
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