BSicon exABZl+ml, see <a href="//commons.wikimedia.org/wiki/BSicon/Catalogue/junctions/2-way#Reversed_layering" title="BSicon/Catalogue/junctions/2-way">BSicon/Catalogue/junctions/2-way#Reversed layering</a> for an overview.
Cmuelle8
2021-06-21
<span class="int-own-work" lang="en">Own work</span>