青云翻译

(3) pipe culverts and box culvert diameter or span regardless of size, how many holes are known as culverts;

(3) box culvert and culvert regardless of the diameter or the number of long-span size and how many are called culverts;

(3) contains and the slab culvert no matter the caliber or the span size, hole number how many, symmetrical are culverts;

( 3) pipe covered and boxes covered whether pipe diameter or cross-drive size, totaling, is known as culverts;

(3) box culvert and culvert regardless of the diameter or the number of long-span size and how many are called culverts;