Going back to my favorite analogy in regards to open source software and proprietary software — proprietary software is like buying a car with the hood welded shut.
回顾我最爱的那些关于软件源代码和私有软件的类推法——私有软件如同买辆非敞篷车。
Square tube in cold neutron channel is welded together by aluminum alloy plate, it is used to guide neutron from cold neutron source.
冷中子孔道方管采用铝合金材料焊接而成，其作用是从冷中子源引出中子。
The temperature field and residual stress field were obtained by using 3-D double-ellipsoidal heat source model to simulate welded process.
在模型中运用移动的三维双椭球体热源作为输入热源来模拟焊接过程，最终获得了焊接温度场和残余应力场。
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