尽管战胜了巨大的技术挑战，但是测量仪器在使用磨光其主要镜片过程中产生的故障使得每张图像都模糊不清。
Despite overcoming enormoustechnical challenges, the malfunction of a measuring device usedduring the polishing of the primary mirror rendered every imageblurred.
可用性——测量系统的正常运行时间，并包括高可用性和故障恢复。
Availability a "measures the system 'up-time, and includes high-availability and disaster recovery."
分析了故障测距用行波信号对测量互感器的要求。
The requirements of fault location signals to measurement transformers are analyzed.
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