pipe guardrail管式护栏
steel guardrail钢板护栏
traffic guardrail交通护栏
Guardrail Tubes护栏管
sidewalk guardrail人行道护栏
guardrail height护栏高度
guardrail post护栏立柱
guardrail plate防阻板
Guardrail design护栏设计
N-COUNT（可数名词） A guardrail is a railing that is placed along the edge of something such as a staircase, path, or boat, so that people can hold onto it or so that they do not fall over the edge. 护栏