检视线 meaning in Chinese

sightline

The causes leading to somewhat low indicating value of the flame detector for very few burners in coal - fired utility boiler or misjudgement of the value have been analysed , and resolving measures , such as adjusting the detection distance of the flame detector , eliminating shield of vision for the flame detector , revising the critical value and background evaluation etc . , being put forward
摘要分析了电站燃煤锅炉个别燃烧器火检指示值偏低或误判的原因，提出了调整火检的检测距离，消除火检视线遮挡，以及修改火检的临界值和背景值等解决措施。