The virtual instrument has opening , easy using , characteristic with high cost performance to the traditional instrument, already been used widely in the detection system at present.
虚拟仪器相对于传统仪器具有开放性，易用性，性价比高的特点，目前已经在检测系统中得到广泛应用。
2
A usually adjustable opening in an optical instrument, such as a camera or a telescope, that limits the amount of light passing through a lens or onto a mirror.
光学仪器上的一个可调开口，如照相机或望远镜，它控制穿过镜头的或到镜面的光的数量。
3
The detachable plate and programmable automated test sequencing offer remote testing capability, allowing multiple tests without opening an enclosure to reset the instrument.