Plastics water trough for fighting gas explosions in tunnels - is stabilised by ribs and will not deform under very hot conditions

摘要

A plastic water trough produces a trough barrier for fighting gas explosions in tunnels. All round the upper rim at a certain level are stabilizing ribs, and the bottom is similarly stabilized with ribs in a star formation. A cover lid also with ribs in star formation, but of thinner plastic fits over the upper rim of the trough. USE/ADVANTAGE - A light yet stable construction, does not deform under very hot conditions.