A drawing instrument for drawing straight or dashed lines including a scriber support assembly composed of a body part slidable in a groove on a ruler and an arm part which extends beyond either edge of the ruler and carries at its outer... LO Vale-Caban - US 被引量: 6发表: 1993年 Th...
The longitudinal edges 6 and 7 of the main body 2 are parallel to each other, with each edge being intended to provide a guide edge for a marking implement, such as a pencil, pen, scriber or the like (not shown) which is to be used to produce the requisite markings, i.e., continu...