Skid mounted cables shall be supported by galvanised or 316 stainless steel return edge flange type cable tray restricted to one bank high.
Непонятен кусок "return edge flange type cable tray restricted to one bank high". Что это за лотки?

Выражение встречается в следующем контексте:
Спецификация для КИПа, статья называется:
7.0 CABLE, GLANDS, TRANSITS AND EARTHING
Skid mounted cables shall be supported by galvanised or 316 stainless steel return edge flange type cable tray restricted to one bank high. Cable tray shall have a perforated bottom to prevent water accumulation. In the case of runs carrying only 1 or 2 cables Unistrut may be used as an alternative form of support. Covers shall be fitted to both the tray and the Unistrut. Insulating washers shall be installed between tray and support brackets if the materials are liable to galvanic reaction.

Заранее спасибо