hip and valley roof  有交的四坡屋顶

valley roof  带斜沟屋顶

Changing flat roof to slope roof  平改坡

diagonal ridge for hip roof，vertical ridge for gable roof  垂脊

flat- roof-to- slope-roof  平改坡

flat-roof-to-slope-roof  平改坡

flat-roof-to-sloping roof  平改坡

roof pressure roof weight  顶板压力

roof prism (=roof-angle prism)  屋脊棱镜

glacial valley (galical-carved valley)  冰川谷

The super-wisdom valley The Bo Ruo Valley  般若谷

The super-wisdom valley(The Bo Ruo Valley)  般若谷

U-shaped valley(U-valley)  U形谷

valley in valley  谷中谷

Valley-in-Valley  谷中谷

V-shaped valley(V-valley)  V形谷

10104 m3 floating roof tank  10104m3浮顶油罐

3-D curved roof  双曲屋面; 话音插控技术

absolute roof  绝对粗糙度