GIỚI THIỆU CHUNG VỀ MÔN VẼ
KỸ THUẬT CƠ KHÍ
CHƯƠNG I
VẼ QUY ƯỚC REN CÁC MỐI GHÉP
1.1. Ren
1.1.1. Đường xoắn ốc
•Vòng xoắn
•Bước xoắn
•Góc xoắn
a. Đường xoắn ốc trụ b. Đường xoắn ốc nón
1.1.2. Hình thành mặt ren
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