t_wの輪郭

https://dl.ndl.go.jp/info:ndljp/pid/902994/50
ca https://dl.ndl.go.jp/info:ndljp/pid/902994/50
ce https://dl.ndl.go.jp/info:ndljp/pid/902994/57
ch https://dl.ndl.go.jp/info:ndljp/pid/902994/58
ci https://dl.ndl.go.jp/info:ndljp/pid/902994/63
cl https://dl.ndl.go.jp/info:ndljp/pid/902994/64
co https://dl.ndl.go.jp/info:ndljp/pid/902994/68
cr https://dl.ndl.go.jp/info:ndljp/pid/902994/88
cu https://dl.ndl.go.jp/info:ndljp/pid/902994/92