Normal production conditions, often open the two Taiwan screw compressor and a piston compressor, mainly for converter, rolling and tropical in three production unit of gas supply.

正常生产情况下，通常开两台螺杆压缩机和一台活塞压缩机，主要给转炉、中轧和热带三家生产单位供气。

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In water, paddles and OARS have given way to screw propellers and turbines, but stability in response to the rolling motion of water is still a problem.

在水里，桨橹已经由螺旋桨和涡轮机替代，但是在涌动的水里使船只保持平稳仍然是一个问题。

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The flow function method was applied to the process of screw rolling balls in the paper. The computing formulas of rolling power and force were given. Finally the computing example was presented.

采用流函数方法，对螺旋孔型斜轧过程进行了分析，得到了轧制过程力能参数的计算公式，并进行了实例计算和比较。

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Manipulating the shape of the threads using this method, called thread-rolling, was thought to be impossible because it would be too hard to control the structure of the screw if metal oozed into odd shapes.

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