\documentclass[tikz,border=5pt]{standalone}
\usepackage{tikz-cd}
\usepackage{tikz}
\begin{document}
\begin{tikzpicture}[x=0.55pt,y=0.55pt,yscale=-1,xscale=1]
\draw (120,110) .. controls (120,98.95) and (128.95,90) .. (140,90) .. controls (151.05,90) and (160,98.95) .. (160,110) .. controls (160,121.05) and (151.05,130) .. (140,130) .. controls (128.95,130) and (120,121.05) .. (120,110) -- cycle ;
\draw (170,110) .. controls (170,104.48) and (174.48,100) .. (180,100) .. controls (185.52,100) and (190,104.48) .. (190,110) .. controls (190,115.52) and (185.52,120) .. (180,120) .. controls (174.48,120) and (170,115.52) .. (170,110) -- cycle ;
\draw (200,110) .. controls (200,104.48) and (204.48,100) .. (210,100) .. controls (215.52,100) and (220,104.48) .. (220,110) .. controls (220,115.52) and (215.52,120) .. (210,120) .. controls (204.48,120) and (200,115.52) .. (200,110) -- cycle ;
\draw (230,110) .. controls (230,104.48) and (234.48,100) .. (240,100) .. controls (245.52,100) and (250,104.48) .. (250,110) .. controls (250,115.52) and (245.52,120) .. (240,120) .. controls (234.48,120) and (230,115.52) .. (230,110) -- cycle ;
\draw (260,110) .. controls (260,104.48) and (264.48,100) .. (270,100) .. controls (275.52,100) and (280,104.48) .. (280,110) .. controls (280,115.52) and (275.52,120) .. (270,120) .. controls (264.48,120) and (260,115.52) .. (260,110) -- cycle ;
\draw (290,110) .. controls (290,104.48) and (294.48,100) .. (300,100) .. controls (305.52,100) and (310,104.48) .. (310,110) .. controls (310,115.52) and (305.52,120) .. (300,120) .. controls (294.48,120) and (290,115.52) .. (290,110) -- cycle ;
\draw (320,110) .. controls (320,104.48) and (324.48,100) .. (330,100) .. controls (335.52,100) and (340,104.48) .. (340,110) .. controls (340,115.52) and (335.52,120) .. (330,120) .. controls (324.48,120) and (320,115.52) .. (320,110) -- cycle ;
\draw (350,110) .. controls (350,104.48) and (354.48,100) .. (360,100) .. controls (365.52,100) and (370,104.48) .. (370,110) .. controls (370,115.52) and (365.52,120) .. (360,120) .. controls (354.48,120) and (350,115.52) .. (350,110) -- cycle ;
\draw (380,110) .. controls (380,104.48) and (384.48,100) .. (390,100) .. controls (395.52,100) and (400,104.48) .. (400,110) .. controls (400,115.52) and (395.52,120) .. (390,120) .. controls (384.48,120) and (380,115.52) .. (380,110) -- cycle ;
\draw (410,110) .. controls (410,104.48) and (414.48,100) .. (420,100) .. controls (425.52,100) and (430,104.48) .. (430,110) .. controls (430,115.52) and (425.52,120) .. (420,120) .. controls (414.48,120) and (410,115.52) .. (410,110) -- cycle ;
\draw (440,110) .. controls (440,104.48) and (444.48,100) .. (450,100) .. controls (455.52,100) and (460,104.48) .. (460,110) .. controls (460,115.52) and (455.52,120) .. (450,120) .. controls (444.48,120) and (440,115.52) .. (440,110) -- cycle ;
\draw (200,150) .. controls (200,144.48) and (204.48,140) .. (210,140) .. controls (215.52,140) and (220,144.48) .. (220,150) .. controls (220,155.52) and (215.52,160) .. (210,160) .. controls (204.48,160) and (200,155.52) .. (200,150) -- cycle ;
\draw (190,110) -- (200,110) ;
\draw (220,110) -- (230,110) ;
\draw (250,110) -- (260,110) ;
\draw (280,110) -- (290,110) ;
\draw (310,110) -- (320,110) ;
\draw (340,110) -- (350,110) ;
\draw (370,110) -- (380,110) ;
\draw (400,110) -- (410,110) ;
\draw (430,110) -- (440,110) ;
\draw (160,110) -- (170,110) ;
\draw (210,120) -- (210,140) ;
\draw (131,102.4) node [anchor=north west][inner sep=0.75pt] {$3$};
\end{tikzpicture}
\end{document}