Form	Roughness	Form of roughness
Form	Roughness	1	2	3	4
A	Without roughness	A1
	10 cm	A2-1	A2-2	A2-3	A2-4
	20 cm	A3-1	A3-2	A3-3	A3-4
	30 cm	A4-1	A4-2	A4-3	A4-4
	50 cm	A5-1	A5-2	A5-3	A5-4
B	Without roughness	B1
	10 cm	B2-1	B2-2	B2-3	B2-4
	20 cm	B3-1	B3-2	B3-3	B3-4
	30 cm	B4-1	B4-2	B4-3	B4-4
	50 cm	B5-1	B5-2	B5-3	B5-4
C	Without roughness	C1
	10 cm	C2-1	C2-2	C2-3	C2-4
	20 cm	C3-1	C3-2	C3-3	C3-4
	30 cm	C4-1	C4-2	C4-3	C4-4
	50 cm	C5-1	C5-2	C5-3	C5-4
D	Without roughness	D1
	10 cm	D2-1	D2-2	D2-3	D2-4
	20 cm	D3-1	D3-2	D3-3	D3-4
	30 cm	D4-1	D4-2	D4-3	D4-4
	50 cm	D5-1	D5-2	D5-3	D5-4