Failure analysis of side rail box imitating chief beam of metallurgy crane was studied. Cause of fatigue failure and improving method were given.
介绍了冶金起重机金属结构偏轨箱形模拟主梁的疲劳失效分析研究结果，提出疲劳失效的原因及改进措施。
There is a box fixed beneath the chalk rail of the blackboard.
黑板下方横木条底下设有一个盒子。
Box standards consistent with international experience, can be used as warehouse and shipping and rail transport and so on!
符合国际验箱标准，可用作仓库和海运及铁路运输等等！
The master drive box guide rail used has inlaid installs the type structure, its characteristic was bears the evil spirit andeasy to overhaul.
主传动箱的导轨采用了镶装式结构，其特殊点是耐磨和易于检修。 床身导轨进行了特殊的表层淬火处理，从而提高了导轨的耐磨性。
The master drive box guide rail used has inlaid installs the type structure, its characteristic was bears the evil spirit andeasy to overhaul.
主传动箱的导轨采用了镶装式结构，其特殊点是耐磨和易于检修。 床身导轨进行了特殊的表层淬火处理，从而提高了导轨的耐磨性。
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