supply of different types of heavy duty chain pulley blocks as per scope of supply at 2x10 mw, bhps-iv, jhinna. , hand operated heavy duty chain pulley blocks capacity: 02 tons, lift: 03 mtrs. , no. of fall : 2. confirming to is 3832-2005, ml classification ( swl=100% wll ) , hand operated heavy duty chain pulley blocks capacity: 05 tons, lift: 05 mtrs. , no. of fall : 4. confirming to is 3832-2005, ml classification ( swl=100% wll ) , hand operated heavy duty chain pulley blocks capacity: 10 tons, lift: 05 mtrs. , no. of fall : 4. confirming to is 3832-2005, ml classification ( swl=100% wll )