| 摘要 |
1. Drawing apparatus for displacing technical drawing aids during preparation of a drawing or strip-film original exhibiting a repetitive pattern, comprising a first flat, rectangular support (11) having two graduated scales (14, 15) running parallel along opposite margins of the support (11), with each of which scales an index line is associated, and a second, at least partially transparent support (24) having, disposed on its margins along a straight line, auxiliary scales (27, 28) and index lines (26, 26') serving as reading aids for optically guiding the second support along the index lines of the first support (11), characterized in that there is a third rectangular support (32), that all margins of the third support include one index line (38, 39, 40, 41) each, that a graduated scale (34, 35, 36, 37) is associated with each index line, and that the third support includes a surface area (33) surrounded by the said index lines upon which to lay a drawing sheet. |
