Bµi gi¶ng m«n häc c«ng nghÖ khung vá «t« H×nh vÏ – bµi H2.1 H2.3 H2.2 H2.4 H2.6 H2.5 H2.7 H2.8 H2.9 H2.10 H2.11 H2.12 H2.13 H2.14 H2.15 H2.16 H2.17 H2.18 H2.19 H2.20