| 摘要 |
FIELD: textile; paper. ^ SUBSTANCE: protected base plate includes, at least, one extended protective sign. In addition, the aforesaid protective sign is provided with a line of front sections, which are open in windows line. The windows are implemented in the first surface of the base plate. In addition, there is another line of sections covered with the base plate at their partitions. The partitions are available between windows and in the first surface of base plate. Each front section contains the first protection sign which is provided with similar appearance in each section and visible through each window if one looks in the reflected light at the first surface of base plate. The second sections include the second protection sign which is provided with similar appearance in each second section but differs from the first protection sign. It is not visible in the reflected light when one looks at the first surface of base plate. On the contrary, the second protection sign is visible in radiographic light if one looks at the first surface of base plate. ^ EFFECT: designing of base plate with different protection signs subject to identifying under different observation conditions. ^ 18 cl, 37 dwg, 1 tbl |
