A. OS B. IS C. WS D. NS
A. OS B. IS C. H D. V
A. os B. lj C. fb D. tb
A. YD2500 X 800+2.1002C1 4/3C18 B. JD2800X500+2. 1003C18+2C14 C. YD2 500X800-2. 100 2C14:3C18 D. JD2800X500+2. 100 3C18/2C14