00293cam a2200121ua 4500082001800000100001600018245003800034250001000072260004800082300001200130500000900142700002000151  a604.2bBHA/EL  aBhatt, N D.  aElementary Engineering Drawing /   a44 /   aNew Delhi : bCharotar Book Stall , c2006.  a491 ; .  a*CSS1 aPanchal, V.M  .