128356 ⎘
Locks or dry-docks ; 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 Devices for filling or emptying locks
Hydroxide stabilization as a means of controlling surface fouling associated with wetted surfaces of boats barges and ships
#2Herodotus machine
#3Canal water refill system
#4CANAL LOCK SYSTEM
#5Liquid level regulation apparatus