Merge branch 'lab12' into 'master'

Lab12 See merge request !3

Merge branch 'lab12' into 'master'
0974a18b · 李川 · a48bf7e6 · 883d2d4e · 0974a18b · 0974a18b
--- a/74LS190.dlsche
+++ b/74LS190.dlsche
--- a/74LS190.dlsche.svg
+++ b/74LS190.dlsche.svg