Is the strengthening of circular tanks for transport, this prevents the tanks from becoming warped. The tanks are strengthened with steel or wood crossbeams giving a "spider" appearance
SC Transgor Logistik SRL, International Transport and Eastern Europe Freight Forwarding, Freight Forwarding, Logistics & Transport Glossary, Tomesti, Iasi, Romania 2012. http://www.transgor.ro/wp-content/uploads/2012/05/ termeni-logistici.pdf, (Log - Brit) {573}