"데이터 시트"
a - width of joint
from 0 to 4 [mm]
from 5 to 9 [mm]
from 10 to 20 [mm]
from 21 to 40 [mm]
greater than 40 [mm]
b - depth of joint
increase the width of the joint
b = a
b = 10 [mm]
b = a/2[mm]
reduce the width of the joint
