Sand box assembly as per Drg. No. 1209- 01. 138- 031, Alt- 7, Ref nos. 01 to 20 or latest if any & STR No. CLW/ 2023/ ELDO/ M/ STR/ 158 Rev. ' 0 ' Jan 2023 or latest if any. Firm shall ensure water leakage test on Full purchase order quantity & punch mark on each sand box assembly as