研究和设计了一实验性双端差分吸收激光雷达系统。
An experimental laser radar system with double end differential absorption is studied and designed.
双端螺纹松质骨加压螺钉的特点是两端螺纹具有不同的螺距，无螺帽。
Compression cancellous bone screw with both ends thread is a Variable pitch screw designed tO provide rigid 'fixation of cancellous bone fracture.
你们能看到这个双端闸床破裂，压力大约是在20到25磅每平方英寸。
You can see in this double ended guillotine break the pressure was around twenty two to twenty five psi.
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