| Description | Hall Stage Equipment Ltd operating and maintenance instructions, including 9 drawings by Hall Stage Equipment Ltd, drawing numbers Y-90/3 issue B, Y-90/4, Y90-5 issue A, Y90-6, Y[90]/14, Y90/16, Y90/18, Y90/28 and Y90/W-713, and 6 drawings by Evershed Power-Optics Ltd, drawing numbers V4414/01 issue H, V4473 issue C, V4506, W6925, X14196 issue B and Y26800. A drawing issue sheet for some of these drawings is also inlcuded. |