00265nam a22001097a 4500040000700000082000800007100003000015245006300045260002500108942000700133999001500140  cSK  a750  aសួស ចំណាន  aRural engineering; វិស្វកម្មជនបទ  aRUAbសួសc2011  cKB  c9243d9243