公路噪声屏障材料和国家成本费用的英文

highway traffic noise barrier materials and cost by state

• 公路:    highway
• 噪声:    noise; stew; swish ...
• 屏障:    protective screen
• 材料:    material
• 和:    mix; blend
• 国家:    country; state; na ...
• 成本:    prime cost; cost; ...
• 费用:    cost; expenses; ou ...