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1·The output current is never influenced by power supply, realizing the invariableness of load current.

输出电流不受供电电压波动的影响，实现了电路的恒流功能。

2·An invariableness pressure decompression valve is added to common PCM to keep pressure discrepancy invariable approximately.

在原有PCM流量控制阀组中加上一个定差减压阀，使压力差近似保持定值。

3·Voxel attributes, voxel density and the way to keep the invariableness of voxel density are studied, and the method of parallel data transmission link is discussed.

首先，分析体扫描技术的成像原理，研究体素的特性，密度变化，如何保持体素密度的恒定，提出了并行数据传输连接的方法。

4·Tiny deformation will appear in the local of the propeller shaft of certain ship which is endured an invariableness load, although the shaft stress is within the elastic limit range.

某舰的螺旋桨尾轴长期处在恒定载荷作用下，虽然尾轴应力在弹性极限范围内，但是尾轴局部还是很容易发生微量的塑性变形。