00373nam a2200097Ia 4500008004100000082002400041245012000065260002500185300000900210650005600219140224s9999    xx            000 0 und d  aS 69.027.1:697.8 K2  aIndian standard code of practice for design and construction of flues and Chimneys for domestic heating appliances.  aNew DelhibISIc1962  a36p.  aFlue gases-standards-India,Chimneys-standards-India