guard-railsBNC²³⁶²¹³⁺¹ 基本例句 n.护栏guardrail的复数形式原型guard-rail的复数 All sides of the working platform shall be installed with top guard-rails900-1150mm height, intermediate guard- rails450-600mm height, toe- boards 200mm height and safe access and egress. 工作台的所有方向都应安装顶端护栏900-1150毫米高，中间护栏450-600毫米高，踢脚板200毫米高和安全进出口。 iciba