up and/or under?
Whatever it is, it's some sort of work platform:
(from my notes)
Nacelle Gondola; cherry picker, manbucket, access platform, telescopic basket [Channel Tunnel 1, p95, Bouygues], man-basket [Construction Europe,7-8.96p51, CEi,12/97p14], work platform [nCE,28.11.96p21], basket boom [TTI,12/99,p.45]; man access basket [TTI,5/99,p.11]
Nacelle à déport négatif Mobile underbridge platform/basket [CEi,10/98, p.24; BTPM,10/99p.vii]
If in connection with previous questions about overhead lines and support structures (for ex.), then presumably one of the former; if in connection with bridges, then possibly the latter.
Local time: 09:48
Specializes in field
Native speaker of: English
PRO pts in category: 806