Naqshai chizero bo andozahoi asli- ash kashidan na hama vaqt mumkin va ba maqsad muvofiq ast. Tabiist, ki naqshai dastgohu moshinho, binovu imo- rathoro ba andozai khurd kashidan lozim meoyad. Baraks, baze juzhoi masnuot khele khurd meboshand, masalan, qismhoi soat, baze asbobu mekhanizmhoi daqiq va g. In guna juzhoi khurdro nazar ba andozai asliashon kalontar tasvir mekunand.
Nisbati andozahoi dar naqsha tasvir kardashudai jism bar andozahoi asliash miqyosi nassha nomida meshavad.
Miqyosi tasvirho va ishorati onhoro standart muqar- rar kardaast. Beshtar miqyosi 1:1 matlub ast. Dar in mav- rid andozahoro az nav hisob kardan lozim nameoyad (rasmi 36). Gayr az miqyosi asly (1:1) standart miqyoshoi 1:2, 1:2.5, 1:4, 1:5, 1:10 va g.-ro, yane tasvirro 2, 2,5, 4, 5, 10 karat va g. khurd sokhtan, inchunin ba 2, 2, 5, 4, 5, 10 karat kalon sokhtan va tatbiq namudani miqyoshoi 2:1, 2.5:1, 4:1, 5:1, 10:1 rukhsat medihad.
Miqyosro in tavr menavisand: M1:1, M1:2, M4:1 va g. Agar miqyosro dar kataki makhsusi navishtajoti asosii naqsha nishon dihand, on goh harfi M-ro mepartoyand.
Tasvir dar miqyoshoi gunogun sokhta shavad ham, vale dar naqsha doimo andozahoi aslii masnuotro nishon me- dihand (rasmi 36).
Andozahoi kunjy hangomi khurd yo kalon kardani tasvir tagyir nameyoband.
1. Miqyos chist va chi zarurat dorad?
2. Standart tatbiq namudani chi guna miqyoshoro muqarrar kardaast?