短語詞組短語significant headway 重要進(jìn)展Headway distribution 班距分佈;車頭時距分佈Headway Elasticity 班距彈性Safe headway 安全的行進(jìn)間距或車距limited headway 有限淨(jìng)空高CHAIN HEADWAY 正河源signaling headway 使得maximum headway 最大車間距Real Headway 真正進(jìn)展make headway 取得進(jìn)展；有進(jìn)展 返回 headway