procurement of suction strainer ,primary filter etc., for the use of track machines.,hydraulic pressure filter element (suction filter)as per harsco part no. 0-3354001-0- 04, make - harsco or its equivalent. ] , suction strainer (suction filter) as per harsco part no. 0-3351002-0-03, make - harsco or its equivalent. ] , primary filter (catridge/pneumatic) as per harsco part no. 4011082, make:- harsco o r its equivalent ] , secondary filter (catridge/pneumatic) as per harsco part no. 4011083, make:- harsco or its equivalent. ] , membrane module (pneumatic) as per harsco part no. 3404830, make:- harsco or its e quivalent. ]