The results show that the crane is unnecessary to replace for its low total stress level and large strength margin of the main girder (main stressed part).
计算结果指出：门机结构总体应力水平较低，其严重受力件主梁具有较大的强度富裕度，不必更换。
The research shows that stress level of the crane structure is low and crane girder has large enough strength margin to assure the safety of using crane under extended service.
研究结果表明门机结构总体应力水平较低，严重受力件主梁具有较大的强度富裕度，可以保证超期服役的安全性。
Foundation soil strength is the strength of limit damage, to ensure that no damage occurred foundation, foundation strength sufficient safety margin.
地基强度是指地基发生极限破坏的强度，为保证不发生地基破坏，地基强度要有足够的安全储备。
So it is hard to accurately calculate, and the design only works by experience, which will result in the lack of local strength or excessive safety margin and so on.
对于实际结构，由公式计算的结果往往误差较大，特别是高应力区域，难以精确计算，工程上只能采用经验设计，这样会导致结构的局部强度不足或整体安全裕度过高等不合理现象。
The thickness of a sealing surface of the head reaches up to over 80% of the using thickness of the head, and the strength margin of the head is enhanced.
封头的密封面处厚度达到封头取用厚度的80%以上，其封头的强度裕度得到增强。
The dongguan countries margin can Co. , LTD. Good faith, the strength and product quality gain recognition of the industry.
东莞国裕制罐有限公司的诚信、实力和产品质量获得业界的认可。
The dongguan countries margin can Co. , LTD. Good faith, the strength and product quality gain recognition of the industry.
东莞国裕制罐有限公司的诚信、实力和产品质量获得业界的认可。
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