... 冰强度等级 ice strengthened class 低强度等级 low-strength level 强度等级 class of cube strength; strength grade; strength level ...
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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。
Due to low soil strength, high underground water level and strong soil plasticity flow, unstability accidents happened frequently in soft soil area.
软土地区由于土体强度低，地下水位高，流塑性强，基坑失稳事故频发。
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