IPC 2013 : E02C 1/04 : with floating troughs.

IPC2013 > E > E02 > E02C > E02C 1/00 > E02C 1/04[1] > with floating troughs.
Notes[t] E01 - E06: BUILDING
E SECTION E — FIXED CONSTRUCTIONS.
E02 HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL-SHIFTING.
E02C SHIP-LIFTING DEVICES OR MECHANISMS.
E02C 1/00 Locks; Shaft locks, i.e. locks of which one front side is formed by a solid wall with an opening in the lower part through which the ships pass (lock gates E02B 7/20).
E02C 1/04 · with floating troughs.