套圈打字时,往往出现字迹深浅不一。我们曾采用垫字头,垫模具和严格控制字头高度等办法,但效果仍不理想,现采用图示的可调节下模,保证了打字质量。方法:先让三个楔形块放松,试打一个套圈,测出三个字迹的深浅,如哪个字迹最浅, Rings, typing often appear different shades. We have used mat prefix, mat mold and strict control of the prefix height and other methods, but the effect is still not ideal, is the use of the icon to adjust the mode, to ensure the typing quality. Methods: Let the three wedge-shaped block to relax, try to hit a ring, measured the depth of the three handwriting, such as which handwriting is the most shallow,