$""$ single$-$level bill of material$().1000($part explosion$).(20)$

$\backslash$table$[[],[,],[,1],[,1],[,1],[0\mathrm{.}7$ mm screw,$2]]$

$\backslash$table$[[],[,],[$Front frame,$1],[$Nose support,$2],[0\mathrm{.}5$ mm screw,$2],[0\mathrm{.}7$ mm screw,$2]]$

$\backslash$table$[[],[,],[$Left leg frame,$1],[$Leg end rubber,$1]]$

$\backslash$table$[[],[,],[$Right leg frame,$1],[$Leg end rubber,$1]]$

$\backslash$table$[[],[,],[,200],[,150],[,120],[,200],[$Front frame,$150],[$Nose support,$800],[0\mathrm{.}7$ mm screw,$500],[0\mathrm{.}5$ mm screw,$400],[$Left leg frame,$200],[$Right leg frame,$500],[$Leg end rubber,$700]]$