What is hume pipe Culvert NP1,NP2,NP,3 and NP4 / Pipe Culvert Kaise Banaya Jata hai...

[@kinsuthakur7663]

Thanks sir

[@GulabChauhan-hv6cq]

Very good

[@prakashkhandekarretiredeng2440]

1200 mm or 600 mm is essential
In pmgsy rd work if depth of cousin less than 600 then we make cradle

[@user-oy2fn1lt9s]

He'd wall me sariya nahi lagaya please reply