指形排水沟 初期沟蚀

fingergullying  detail>>

初期沟蚀

incipient gullying  detail>>

u形排水沟

u drain u-drain  detail>>

v形排水沟

v-drain  detail>>

拱形排水沟

arch drain  detail>>

筒形排水沟

barrel-drain  detail>>

半圆形排水沟

semicircular drain  detail>>

人字形排水沟

chevron drain chevrondrain herringbone drain  detail>>

排水沟

drainage ditch; drain; watering; waterway; gutterway; outfall ditch; rhine; sough; dike; escape cana...  detail>>

排水沟；截水沟

catch drain  detail>>

排水沟排水沟

gutter waterway  detail>>

排水渠；排水沟

drainage channel  detail>>

v形排水槽

vee gutter  detail>>

v形排水灌

v-drain  detail>>

碟形排水渠

dish drainage channel  detail>>

环形排水槽

garland  detail>>

人字形排水

herringbone drain  detail>>

筒形排水渠

barrel culvert barrel drain  detail>>