light grade meaning in Chinese

小坡度

Specification for railway turnouts for private users - light grade turnouts over which british railways locomotives do not operate , for axle loads not exceeding 10 tons , using flat bottom rails
私营铁路道岔规范.第2部分:英国铁路机车不运行的轴负荷不超过10吨的轻型平底钢轨岔道
Because the airfield light dimmer control system has operating fast , reliable characteristics during switching over the light grade , the designs of systematic software and hardware are all around these characteristics
由于机场调光系统对切换光级的速度和系统可靠性有特殊要求，所以系统的软硬件部分都是围绕着这两个特点进行设计。