brush passages

...These brushes are used in fish passes so that eels and nematodes can swim safely along the dikes and locks. Thanks to the zigzag pattern of the bristles, eels and other fish have something to cling to while moving upstream; the brush acts like a kind of staircase. These brushes for fish passages are widely used in spillways, locks, pumping stations, and other barriers.

... the cleaning machine and adapts to changing surface profiles. This allows for easy cleaning of hard-to-reach areas such as niches and spots under shelves or handrails, as well as narrow passages, as well as large areas. With the CONVERT® technology, HEFTER cleantech provides another module for polishing floors. The cleaning machine can be converted in seconds, easily swapping the scrubbing-suction...