supply of upper housing assembly for automatic twist lock of blc wagon.upper housing assembly for automatic twist lock of blc wagon.,upper housing assembly for automatic twist lock of blc wagon. drawing no. :- m/s hol land company part no-71474 spec. no:- wd-contr-atl-2025 (rev.02) of may-2025 warranty/guaran tee:- automatic twist lock should be robust and must ensure minimum warranty of 48 months from t he date of manufacture. (for detail please see rdso spec. wd-contr-atl-2025 (rev.02) of may-2025 ) inspection:- i) further all the necessary inspections shall be carried out as per rdso spec. wd-cont r-atl-2025 (rev.02) of may-2025. [ warranty period: 48 months after the date of delivery ] [quantity tolerance (+/-): 5 %age , item category : normal , total po value variation permitt ed: max 8 lacs ] ]