The spur-dike is a common important building which is usually used in river course improvement projects, controlling river trend, bend protection, beam attack sand and high water levels.
丁坝是河道及航道整治工程中一种常用的重要建筑物，具有控制河势、保护岸滩、束水攻沙及壅高水位等多种功能。
In this paper, a method of using single laser — beam spiral scanning to treat the tooth surface of standard spur gear is proposed.
提出标准直齿圆柱齿轮轮齿表面应用单激光束螺旋扫描的处理方法。
In this paper, a method of using single laser — beam spiral scanning to treat the tooth surface of standard spur gear is proposed.
提出标准直齿圆柱齿轮轮齿表面应用单激光束螺旋扫描的处理方法。
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